mirror of
https://github.com/c64scene-ar/llvm-6502.git
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ca932f503b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224339 91177308-0d34-0410-b5e6-96231b3b80d8
1679 lines
60 KiB
C++
1679 lines
60 KiB
C++
//===- MipsDisassembler.cpp - Disassembler for Mips -------------*- C++ -*-===//
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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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//
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// This file is part of the Mips Disassembler.
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//
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//===----------------------------------------------------------------------===//
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#include "Mips.h"
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#include "MipsRegisterInfo.h"
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#include "MipsSubtarget.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDisassembler.h"
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#include "llvm/MC/MCFixedLenDisassembler.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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#define DEBUG_TYPE "mips-disassembler"
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typedef MCDisassembler::DecodeStatus DecodeStatus;
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namespace {
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/// A disasembler class for Mips.
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class MipsDisassemblerBase : public MCDisassembler {
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public:
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MipsDisassemblerBase(const MCSubtargetInfo &STI, MCContext &Ctx,
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bool IsBigEndian)
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: MCDisassembler(STI, Ctx),
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IsGP64Bit(STI.getFeatureBits() & Mips::FeatureGP64Bit),
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IsBigEndian(IsBigEndian) {}
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virtual ~MipsDisassemblerBase() {}
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bool isGP64Bit() const { return IsGP64Bit; }
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private:
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bool IsGP64Bit;
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protected:
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bool IsBigEndian;
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};
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/// A disasembler class for Mips32.
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class MipsDisassembler : public MipsDisassemblerBase {
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bool IsMicroMips;
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public:
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MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool bigEndian)
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: MipsDisassemblerBase(STI, Ctx, bigEndian) {
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IsMicroMips = STI.getFeatureBits() & Mips::FeatureMicroMips;
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}
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bool hasMips3() const { return STI.getFeatureBits() & Mips::FeatureMips3; }
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bool hasMips32() const { return STI.getFeatureBits() & Mips::FeatureMips32; }
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bool hasMips32r6() const {
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return STI.getFeatureBits() & Mips::FeatureMips32r6;
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}
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bool isGP64() const { return STI.getFeatureBits() & Mips::FeatureGP64Bit; }
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bool hasCOP3() const {
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// Only present in MIPS-I and MIPS-II
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return !hasMips32() && !hasMips3();
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}
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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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};
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/// A disasembler class for Mips64.
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class Mips64Disassembler : public MipsDisassemblerBase {
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public:
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Mips64Disassembler(const MCSubtargetInfo &STI, MCContext &Ctx,
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bool bigEndian) :
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MipsDisassemblerBase(STI, Ctx, bigEndian) {}
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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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};
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} // end anonymous namespace
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// Forward declare these because the autogenerated code will reference them.
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// Definitions are further down.
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static DecodeStatus DecodeGPR64RegisterClass(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 DecodeCPU16RegsRegisterClass(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 DecodeGPRMM16RegisterClass(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 DecodeGPRMM16ZeroRegisterClass(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 DecodeGPR32RegisterClass(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 DecodePtrRegisterClass(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeDSPRRegisterClass(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 DecodeFGR64RegisterClass(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 DecodeFGR32RegisterClass(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 DecodeCCRRegisterClass(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 DecodeFCCRegisterClass(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 DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeAFGR64RegisterClass(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 DecodeACC64DSPRegisterClass(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 DecodeHI32DSPRegisterClass(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 DecodeLO32DSPRegisterClass(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 DecodeMSA128BRegisterClass(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 DecodeMSA128HRegisterClass(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 DecodeMSA128WRegisterClass(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 DecodeMSA128DRegisterClass(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 DecodeMSACtrlRegisterClass(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 DecodeCOP2RegisterClass(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 DecodeBranchTarget(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeJumpTarget(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder);
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// DecodeBranchTargetMM - Decode microMIPS branch offset, which is
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// shifted left by 1 bit.
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static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder);
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// DecodeJumpTargetMM - Decode microMIPS jump target, which is
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// shifted left by 1 bit.
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static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeMem(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCacheOp(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSyncI(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFMem2(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFMem3(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
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unsigned Value,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
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unsigned Value,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeLiSimm7(MCInst &Inst,
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unsigned Value,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSimm4(MCInst &Inst,
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unsigned Value,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSimm16(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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// Decode the immediate field of an LSA instruction which
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// is off by one.
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static DecodeStatus DecodeLSAImm(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeInsSize(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeExtSize(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeUImm5lsl2(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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/// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't
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/// handle.
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template <typename InsnType>
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static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeAddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeDaddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeBlezlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeBgtzGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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template <typename InsnType>
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static DecodeStatus
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DecodeBlezGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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namespace llvm {
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extern Target TheMipselTarget, TheMipsTarget, TheMips64Target,
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TheMips64elTarget;
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}
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static MCDisassembler *createMipsDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI,
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MCContext &Ctx) {
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return new MipsDisassembler(STI, Ctx, true);
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}
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static MCDisassembler *createMipselDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI,
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MCContext &Ctx) {
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return new MipsDisassembler(STI, Ctx, false);
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}
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static MCDisassembler *createMips64Disassembler(
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const Target &T,
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const MCSubtargetInfo &STI,
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MCContext &Ctx) {
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return new Mips64Disassembler(STI, Ctx, true);
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}
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static MCDisassembler *createMips64elDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI,
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MCContext &Ctx) {
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return new Mips64Disassembler(STI, Ctx, false);
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}
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extern "C" void LLVMInitializeMipsDisassembler() {
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// Register the disassembler.
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TargetRegistry::RegisterMCDisassembler(TheMipsTarget,
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createMipsDisassembler);
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TargetRegistry::RegisterMCDisassembler(TheMipselTarget,
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createMipselDisassembler);
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TargetRegistry::RegisterMCDisassembler(TheMips64Target,
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createMips64Disassembler);
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TargetRegistry::RegisterMCDisassembler(TheMips64elTarget,
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createMips64elDisassembler);
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}
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#include "MipsGenDisassemblerTables.inc"
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static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
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const MipsDisassemblerBase *Dis = static_cast<const MipsDisassemblerBase*>(D);
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const MCRegisterInfo *RegInfo = Dis->getContext().getRegisterInfo();
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return *(RegInfo->getRegClass(RC).begin() + RegNo);
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}
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template <typename InsnType>
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static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
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const void *Decoder) {
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typedef DecodeStatus (*DecodeFN)(MCInst &, unsigned, uint64_t, const void *);
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// The size of the n field depends on the element size
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// The register class also depends on this.
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InsnType tmp = fieldFromInstruction(insn, 17, 5);
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unsigned NSize = 0;
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DecodeFN RegDecoder = nullptr;
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if ((tmp & 0x18) == 0x00) { // INSVE_B
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NSize = 4;
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RegDecoder = DecodeMSA128BRegisterClass;
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} else if ((tmp & 0x1c) == 0x10) { // INSVE_H
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NSize = 3;
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RegDecoder = DecodeMSA128HRegisterClass;
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} else if ((tmp & 0x1e) == 0x18) { // INSVE_W
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NSize = 2;
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RegDecoder = DecodeMSA128WRegisterClass;
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} else if ((tmp & 0x1f) == 0x1c) { // INSVE_D
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NSize = 1;
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RegDecoder = DecodeMSA128DRegisterClass;
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} else
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llvm_unreachable("Invalid encoding");
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assert(NSize != 0 && RegDecoder != nullptr);
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// $wd
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tmp = fieldFromInstruction(insn, 6, 5);
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if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
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return MCDisassembler::Fail;
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// $wd_in
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if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
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return MCDisassembler::Fail;
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// $n
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tmp = fieldFromInstruction(insn, 16, NSize);
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MI.addOperand(MCOperand::CreateImm(tmp));
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// $ws
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tmp = fieldFromInstruction(insn, 11, 5);
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if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
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return MCDisassembler::Fail;
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// $n2
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MI.addOperand(MCOperand::CreateImm(0));
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return MCDisassembler::Success;
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}
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template <typename InsnType>
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static DecodeStatus DecodeAddiGroupBranch(MCInst &MI, InsnType insn,
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uint64_t Address,
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const void *Decoder) {
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// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
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// (otherwise we would have matched the ADDI instruction from the earlier
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// ISA's instead).
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//
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// We have:
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// 0b001000 sssss ttttt iiiiiiiiiiiiiiii
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// BOVC if rs >= rt
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// BEQZALC if rs == 0 && rt != 0
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// BEQC if rs < rt && rs != 0
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InsnType Rs = fieldFromInstruction(insn, 21, 5);
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InsnType Rt = fieldFromInstruction(insn, 16, 5);
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InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
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bool HasRs = false;
|
|
|
|
if (Rs >= Rt) {
|
|
MI.setOpcode(Mips::BOVC);
|
|
HasRs = true;
|
|
} else if (Rs != 0 && Rs < Rt) {
|
|
MI.setOpcode(Mips::BEQC);
|
|
HasRs = true;
|
|
} else
|
|
MI.setOpcode(Mips::BEQZALC);
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
template <typename InsnType>
|
|
static DecodeStatus DecodeDaddiGroupBranch(MCInst &MI, InsnType insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the ADDI instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b011000 sssss ttttt iiiiiiiiiiiiiiii
|
|
// BNVC if rs >= rt
|
|
// BNEZALC if rs == 0 && rt != 0
|
|
// BNEC if rs < rt && rs != 0
|
|
|
|
InsnType Rs = fieldFromInstruction(insn, 21, 5);
|
|
InsnType Rt = fieldFromInstruction(insn, 16, 5);
|
|
InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rs >= Rt) {
|
|
MI.setOpcode(Mips::BNVC);
|
|
HasRs = true;
|
|
} else if (Rs != 0 && Rs < Rt) {
|
|
MI.setOpcode(Mips::BNEC);
|
|
HasRs = true;
|
|
} else
|
|
MI.setOpcode(Mips::BNEZALC);
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
template <typename InsnType>
|
|
static DecodeStatus DecodeBlezlGroupBranch(MCInst &MI, InsnType insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BLEZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b010110 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BLEZC if rs == 0 && rt != 0
|
|
// BGEZC if rs == rt && rt != 0
|
|
// BGEC if rs != rt && rs != 0 && rt != 0
|
|
|
|
InsnType Rs = fieldFromInstruction(insn, 21, 5);
|
|
InsnType Rt = fieldFromInstruction(insn, 16, 5);
|
|
InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler::Fail;
|
|
else if (Rs == 0)
|
|
MI.setOpcode(Mips::BLEZC);
|
|
else if (Rs == Rt)
|
|
MI.setOpcode(Mips::BGEZC);
|
|
else {
|
|
HasRs = true;
|
|
MI.setOpcode(Mips::BGEC);
|
|
}
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
template <typename InsnType>
|
|
static DecodeStatus DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BGTZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b010111 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BGTZC if rs == 0 && rt != 0
|
|
// BLTZC if rs == rt && rt != 0
|
|
// BLTC if rs != rt && rs != 0 && rt != 0
|
|
|
|
bool HasRs = false;
|
|
|
|
InsnType Rs = fieldFromInstruction(insn, 21, 5);
|
|
InsnType Rt = fieldFromInstruction(insn, 16, 5);
|
|
InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler::Fail;
|
|
else if (Rs == 0)
|
|
MI.setOpcode(Mips::BGTZC);
|
|
else if (Rs == Rt)
|
|
MI.setOpcode(Mips::BLTZC);
|
|
else {
|
|
MI.setOpcode(Mips::BLTC);
|
|
HasRs = true;
|
|
}
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
template <typename InsnType>
|
|
static DecodeStatus DecodeBgtzGroupBranch(MCInst &MI, InsnType insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BGTZ instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b000111 sssss ttttt iiiiiiiiiiiiiiii
|
|
// BGTZ if rt == 0
|
|
// BGTZALC if rs == 0 && rt != 0
|
|
// BLTZALC if rs != 0 && rs == rt
|
|
// BLTUC if rs != 0 && rs != rt
|
|
|
|
InsnType Rs = fieldFromInstruction(insn, 21, 5);
|
|
InsnType Rt = fieldFromInstruction(insn, 16, 5);
|
|
InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
bool HasRt = false;
|
|
|
|
if (Rt == 0) {
|
|
MI.setOpcode(Mips::BGTZ);
|
|
HasRs = true;
|
|
} else if (Rs == 0) {
|
|
MI.setOpcode(Mips::BGTZALC);
|
|
HasRt = true;
|
|
} else if (Rs == Rt) {
|
|
MI.setOpcode(Mips::BLTZALC);
|
|
HasRs = true;
|
|
} else {
|
|
MI.setOpcode(Mips::BLTUC);
|
|
HasRs = true;
|
|
HasRt = true;
|
|
}
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
|
|
if (HasRt)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
template <typename InsnType>
|
|
static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BLEZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b000110 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BLEZALC if rs == 0 && rt != 0
|
|
// BGEZALC if rs == rt && rt != 0
|
|
// BGEUC if rs != rt && rs != 0 && rt != 0
|
|
|
|
InsnType Rs = fieldFromInstruction(insn, 21, 5);
|
|
InsnType Rt = fieldFromInstruction(insn, 16, 5);
|
|
InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler::Fail;
|
|
else if (Rs == 0)
|
|
MI.setOpcode(Mips::BLEZALC);
|
|
else if (Rs == Rt)
|
|
MI.setOpcode(Mips::BGEZALC);
|
|
else {
|
|
HasRs = true;
|
|
MI.setOpcode(Mips::BGEUC);
|
|
}
|
|
|
|
if (HasRs)
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rs)));
|
|
MI.addOperand(MCOperand::CreateReg(getReg(Decoder, Mips::GPR32RegClassID,
|
|
Rt)));
|
|
|
|
MI.addOperand(MCOperand::CreateImm(Imm));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
/// Read two bytes from the ArrayRef and return 16 bit halfword sorted
|
|
/// according to the given endianess.
|
|
static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
|
|
uint64_t &Size, uint32_t &Insn,
|
|
bool IsBigEndian) {
|
|
// We want to read exactly 2 Bytes of data.
|
|
if (Bytes.size() < 2) {
|
|
Size = 0;
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
if (IsBigEndian) {
|
|
Insn = (Bytes[0] << 8) | Bytes[1];
|
|
} else {
|
|
Insn = (Bytes[1] << 8) | Bytes[0];
|
|
}
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
/// Read four bytes from the ArrayRef and return 32 bit word sorted
|
|
/// according to the given endianess
|
|
static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
|
|
uint64_t &Size, uint32_t &Insn,
|
|
bool IsBigEndian, bool IsMicroMips) {
|
|
// We want to read exactly 4 Bytes of data.
|
|
if (Bytes.size() < 4) {
|
|
Size = 0;
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
// High 16 bits of a 32-bit microMIPS instruction (where the opcode is)
|
|
// always precede the low 16 bits in the instruction stream (that is, they
|
|
// are placed at lower addresses in the instruction stream).
|
|
//
|
|
// microMIPS byte ordering:
|
|
// Big-endian: 0 | 1 | 2 | 3
|
|
// Little-endian: 1 | 0 | 3 | 2
|
|
|
|
if (IsBigEndian) {
|
|
// Encoded as a big-endian 32-bit word in the stream.
|
|
Insn =
|
|
(Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) | (Bytes[0] << 24);
|
|
} else {
|
|
if (IsMicroMips) {
|
|
Insn = (Bytes[2] << 0) | (Bytes[3] << 8) | (Bytes[0] << 16) |
|
|
(Bytes[1] << 24);
|
|
} else {
|
|
Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
|
|
(Bytes[3] << 24);
|
|
}
|
|
}
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
|
|
ArrayRef<uint8_t> Bytes,
|
|
uint64_t Address,
|
|
raw_ostream &VStream,
|
|
raw_ostream &CStream) const {
|
|
uint32_t Insn;
|
|
DecodeStatus Result;
|
|
|
|
if (IsMicroMips) {
|
|
Result = readInstruction16(Bytes, Address, Size, Insn, IsBigEndian);
|
|
|
|
DEBUG(dbgs() << "Trying MicroMips16 table (16-bit instructions):\n");
|
|
// Calling the auto-generated decoder function.
|
|
Result = decodeInstruction(DecoderTableMicroMips16, Instr, Insn, Address,
|
|
this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 2;
|
|
return Result;
|
|
}
|
|
|
|
Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, true);
|
|
if (Result == MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
|
|
DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
|
|
// Calling the auto-generated decoder function.
|
|
Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
|
|
this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, false);
|
|
if (Result == MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
|
|
if (hasCOP3()) {
|
|
DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n");
|
|
Result =
|
|
decodeInstruction(DecoderTableCOP3_32, Instr, Insn, Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
}
|
|
|
|
if (hasMips32r6() && isGP64()) {
|
|
DEBUG(dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n");
|
|
Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, Instr, Insn,
|
|
Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
}
|
|
|
|
if (hasMips32r6()) {
|
|
DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n");
|
|
Result = decodeInstruction(DecoderTableMips32r6_64r632, Instr, Insn,
|
|
Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
}
|
|
|
|
DEBUG(dbgs() << "Trying Mips table (32-bit opcodes):\n");
|
|
// Calling the auto-generated decoder function.
|
|
Result =
|
|
decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
DecodeStatus Mips64Disassembler::getInstruction(MCInst &Instr, uint64_t &Size,
|
|
ArrayRef<uint8_t> Bytes,
|
|
uint64_t Address,
|
|
raw_ostream &VStream,
|
|
raw_ostream &CStream) const {
|
|
uint32_t Insn;
|
|
|
|
DecodeStatus Result =
|
|
readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, false);
|
|
if (Result == MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
|
|
// Calling the auto-generated decoder function.
|
|
Result =
|
|
decodeInstruction(DecoderTableMips6432, Instr, Insn, Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
// If we fail to decode in Mips64 decoder space we can try in Mips32
|
|
Result =
|
|
decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI);
|
|
if (Result != MCDisassembler::Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
|
|
return MCDisassembler::Fail;
|
|
|
|
}
|
|
|
|
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::GPR64RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 7)
|
|
return MCDisassembler::Fail;
|
|
unsigned Reg = getReg(Decoder, Mips::GPRMM16RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 7)
|
|
return MCDisassembler::Fail;
|
|
unsigned Reg = getReg(Decoder, Mips::GPRMM16ZeroRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (static_cast<const MipsDisassembler *>(Decoder)->isGP64Bit())
|
|
return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder);
|
|
|
|
return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
|
|
}
|
|
|
|
static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
|
|
}
|
|
|
|
static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 7)
|
|
return MCDisassembler::Fail;
|
|
unsigned Reg = getReg(Decoder, Mips::FCCRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::FGRCCRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMem(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
if(Inst.getOpcode() == Mips::SC ||
|
|
Inst.getOpcode() == Mips::SCD){
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
}
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCacheOp(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Hint = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
Inst.addOperand(MCOperand::CreateImm(Hint));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSyncI(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
int Offset = SignExtend32<10>(fieldFromInstruction(Insn, 16, 10));
|
|
unsigned Reg = fieldFromInstruction(Insn, 6, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 11, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::MSA128BRegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
|
|
// The immediate field of an LD/ST instruction is scaled which means it must
|
|
// be multiplied (when decoding) by the size (in bytes) of the instructions'
|
|
// data format.
|
|
// .b - 1 byte
|
|
// .h - 2 bytes
|
|
// .w - 4 bytes
|
|
// .d - 8 bytes
|
|
switch(Inst.getOpcode())
|
|
{
|
|
default:
|
|
assert (0 && "Unexpected instruction");
|
|
return MCDisassembler::Fail;
|
|
break;
|
|
case Mips::LD_B:
|
|
case Mips::ST_B:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
break;
|
|
case Mips::LD_H:
|
|
case Mips::ST_H:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset * 2));
|
|
break;
|
|
case Mips::LD_W:
|
|
case Mips::ST_W:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset * 4));
|
|
break;
|
|
case Mips::LD_D:
|
|
case Mips::ST_D:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset * 8));
|
|
break;
|
|
}
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Offset = Insn & 0xf;
|
|
unsigned Reg = fieldFromInstruction(Insn, 7, 3);
|
|
unsigned Base = fieldFromInstruction(Insn, 4, 3);
|
|
|
|
switch (Inst.getOpcode()) {
|
|
case Mips::LBU16_MM:
|
|
case Mips::LHU16_MM:
|
|
case Mips::LW16_MM:
|
|
if (DecodeGPRMM16RegisterClass(Inst, Reg, Address, Decoder)
|
|
== MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
break;
|
|
case Mips::SB16_MM:
|
|
case Mips::SH16_MM:
|
|
case Mips::SW16_MM:
|
|
if (DecodeGPRMM16ZeroRegisterClass(Inst, Reg, Address, Decoder)
|
|
== MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
break;
|
|
}
|
|
|
|
if (DecodeGPRMM16RegisterClass(Inst, Base, Address, Decoder)
|
|
== MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
|
|
switch (Inst.getOpcode()) {
|
|
case Mips::LBU16_MM:
|
|
if (Offset == 0xf)
|
|
Inst.addOperand(MCOperand::CreateImm(-1));
|
|
else
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
break;
|
|
case Mips::SB16_MM:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
break;
|
|
case Mips::LHU16_MM:
|
|
case Mips::SH16_MM:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset << 1));
|
|
break;
|
|
case Mips::LW16_MM:
|
|
case Mips::SW16_MM:
|
|
Inst.addOperand(MCOperand::CreateImm(Offset << 2));
|
|
break;
|
|
}
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<12>(Insn & 0x0fff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 21, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 16, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
switch (Inst.getOpcode()) {
|
|
case Mips::SWM32_MM:
|
|
case Mips::LWM32_MM:
|
|
if (DecodeRegListOperand(Inst, Insn, Address, Decoder)
|
|
== MCDisassembler::Fail)
|
|
return MCDisassembler::Fail;
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
break;
|
|
case Mips::SC_MM:
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
// fallthrough
|
|
default:
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
if (Inst.getOpcode() == Mips::LWP_MM || Inst.getOpcode() == Mips::SWP_MM)
|
|
Inst.addOperand(MCOperand::CreateReg(Reg+1));
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
}
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 21, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 16, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFMem(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFMem2(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFMem3(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Offset = SignExtend32<16>(Insn & 0xffff);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips::COP3RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int64_t Offset = SignExtend64<9>((Insn >> 7) & 0x1ff);
|
|
unsigned Rt = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Rt = getReg(Decoder, Mips::GPR32RegClassID, Rt);
|
|
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
|
|
|
|
if(Inst.getOpcode() == Mips::SC_R6 || Inst.getOpcode() == Mips::SCD_R6){
|
|
Inst.addOperand(MCOperand::CreateReg(Rt));
|
|
}
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Rt));
|
|
Inst.addOperand(MCOperand::CreateReg(Base));
|
|
Inst.addOperand(MCOperand::CreateImm(Offset));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// Currently only hardware register 29 is supported.
|
|
if (RegNo != 29)
|
|
return MCDisassembler::Fail;
|
|
Inst.addOperand(MCOperand::CreateReg(Mips::HWR29));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 30 || RegNo %2)
|
|
return MCDisassembler::Fail;
|
|
|
|
;
|
|
unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo >= 4)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::ACC64DSPRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo >= 4)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::HI32DSPRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo >= 4)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::LO32DSPRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::MSA128BRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::MSA128HRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::MSA128WRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::MSA128DRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 7)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::MSACtrlRegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (RegNo > 31)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Reg = getReg(Decoder, Mips::COP2RegClassID, RegNo);
|
|
Inst.addOperand(MCOperand::CreateReg(Reg));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget(MCInst &Inst,
|
|
unsigned Offset,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int32_t BranchOffset = (SignExtend32<16>(Offset) * 4) + 4;
|
|
Inst.addOperand(MCOperand::CreateImm(BranchOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeJumpTarget(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
|
|
unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
|
|
Inst.addOperand(MCOperand::CreateImm(JumpOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
|
|
unsigned Offset,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int32_t BranchOffset = SignExtend32<21>(Offset) * 4;
|
|
|
|
Inst.addOperand(MCOperand::CreateImm(BranchOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
|
|
unsigned Offset,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int32_t BranchOffset = SignExtend32<26>(Offset) * 4;
|
|
|
|
Inst.addOperand(MCOperand::CreateImm(BranchOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
|
|
unsigned Offset,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int32_t BranchOffset = SignExtend32<16>(Offset) * 2;
|
|
Inst.addOperand(MCOperand::CreateImm(BranchOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1;
|
|
Inst.addOperand(MCOperand::CreateImm(JumpOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
|
|
unsigned Value,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (Value == 0)
|
|
Inst.addOperand(MCOperand::CreateImm(1));
|
|
else if (Value == 0x7)
|
|
Inst.addOperand(MCOperand::CreateImm(-1));
|
|
else
|
|
Inst.addOperand(MCOperand::CreateImm(Value << 2));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
|
|
unsigned Value,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(Value << 2));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeLiSimm7(MCInst &Inst,
|
|
unsigned Value,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
if (Value == 0x7F)
|
|
Inst.addOperand(MCOperand::CreateImm(-1));
|
|
else
|
|
Inst.addOperand(MCOperand::CreateImm(Value));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm4(MCInst &Inst,
|
|
unsigned Value,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<4>(Value)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm16(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Insn)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeLSAImm(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// We add one to the immediate field as it was encoded as 'imm - 1'.
|
|
Inst.addOperand(MCOperand::CreateImm(Insn + 1));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeInsSize(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// First we need to grab the pos(lsb) from MCInst.
|
|
int Pos = Inst.getOperand(2).getImm();
|
|
int Size = (int) Insn - Pos + 1;
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeExtSize(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Size = (int) Insn + 1;
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<19>(Insn) * 4));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<18>(Insn) * 8));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
int32_t DecodedValue;
|
|
switch (Insn) {
|
|
case 0: DecodedValue = 256; break;
|
|
case 1: DecodedValue = 257; break;
|
|
case 510: DecodedValue = -258; break;
|
|
case 511: DecodedValue = -257; break;
|
|
default: DecodedValue = SignExtend32<9>(Insn); break;
|
|
}
|
|
Inst.addOperand(MCOperand::CreateImm(DecodedValue << 2));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
// Insn must be >= 0, since it is unsigned that condition is always true.
|
|
assert(Insn < 16);
|
|
int32_t DecodedValues[] = {128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64,
|
|
255, 32768, 65535};
|
|
Inst.addOperand(MCOperand::CreateImm(DecodedValues[Insn]));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeUImm5lsl2(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address, const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(Insn << 2));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeRegListOperand(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3, Mips::S4, Mips::S5,
|
|
Mips::S6, Mips::FP};
|
|
unsigned RegNum;
|
|
|
|
unsigned RegLst = fieldFromInstruction(Insn, 21, 5);
|
|
// Empty register lists are not allowed.
|
|
if (RegLst == 0)
|
|
return MCDisassembler::Fail;
|
|
|
|
RegNum = RegLst & 0xf;
|
|
for (unsigned i = 0; i < RegNum; i++)
|
|
Inst.addOperand(MCOperand::CreateReg(Regs[i]));
|
|
|
|
if (RegLst & 0x10)
|
|
Inst.addOperand(MCOperand::CreateReg(Mips::RA));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3};
|
|
unsigned RegNum;
|
|
|
|
unsigned RegLst = fieldFromInstruction(Insn, 4, 2);
|
|
// Empty register lists are not allowed.
|
|
if (RegLst == 0)
|
|
return MCDisassembler::Fail;
|
|
|
|
RegNum = RegLst & 0x3;
|
|
for (unsigned i = 0; i < RegNum - 1; i++)
|
|
Inst.addOperand(MCOperand::CreateReg(Regs[i]));
|
|
|
|
Inst.addOperand(MCOperand::CreateReg(Mips::RA));
|
|
|
|
return MCDisassembler::Success;
|
|
}
|