mirror of
https://github.com/c64scene-ar/llvm-6502.git
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bc2160f7c9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187695 91177308-0d34-0410-b5e6-96231b3b80d8
800 lines
29 KiB
C++
800 lines
29 KiB
C++
//===- XCoreDisassembler.cpp - Disassembler for XCore -----------*- 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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/// \file
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/// \brief This file is part of the XCore Disassembler.
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///
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//===----------------------------------------------------------------------===//
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#include "XCore.h"
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#include "XCoreRegisterInfo.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/MemoryObject.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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typedef MCDisassembler::DecodeStatus DecodeStatus;
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namespace {
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/// \brief A disassembler class for XCore.
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class XCoreDisassembler : public MCDisassembler {
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OwningPtr<const MCRegisterInfo> RegInfo;
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public:
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XCoreDisassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info) :
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MCDisassembler(STI), RegInfo(Info) {}
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/// \brief See MCDisassembler.
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virtual DecodeStatus getInstruction(MCInst &instr,
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uint64_t &size,
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const MemoryObject ®ion,
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uint64_t address,
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raw_ostream &vStream,
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raw_ostream &cStream) const;
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const MCRegisterInfo *getRegInfo() const { return RegInfo.get(); }
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};
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}
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static bool readInstruction16(const MemoryObject ®ion,
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uint64_t address,
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uint64_t &size,
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uint16_t &insn) {
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uint8_t Bytes[4];
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// We want to read exactly 2 Bytes of data.
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if (region.readBytes(address, 2, Bytes) == -1) {
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size = 0;
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return false;
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}
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// Encoded as a little-endian 16-bit word in the stream.
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insn = (Bytes[0] << 0) | (Bytes[1] << 8);
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return true;
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}
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static bool readInstruction32(const MemoryObject ®ion,
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uint64_t address,
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uint64_t &size,
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uint32_t &insn) {
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uint8_t Bytes[4];
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// We want to read exactly 4 Bytes of data.
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if (region.readBytes(address, 4, Bytes) == -1) {
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size = 0;
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return false;
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}
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// Encoded as a little-endian 32-bit word in the stream.
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insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
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(Bytes[3] << 24);
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return true;
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}
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static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
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const XCoreDisassembler *Dis = static_cast<const XCoreDisassembler*>(D);
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return *(Dis->getRegInfo()->getRegClass(RC).begin() + RegNo);
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}
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static DecodeStatus DecodeGRRegsRegisterClass(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 DecodeRRegsRegisterClass(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 DecodeBitpOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeNegImmOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus Decode2RInstruction(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 Decode2RImmInstruction(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 DecodeR2RInstruction(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 Decode2RSrcDstInstruction(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 DecodeRUSInstruction(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 DecodeRUSBitpInstruction(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 DecodeRUSSrcDstBitpInstruction(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 DecodeL2RInstruction(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 DecodeLR2RInstruction(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 Decode3RInstruction(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 Decode3RImmInstruction(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 Decode2RUSInstruction(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 Decode2RUSBitpInstruction(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 DecodeL3RInstruction(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 DecodeL3RSrcDstInstruction(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 DecodeL2RUSInstruction(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 DecodeL2RUSBitpInstruction(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 DecodeL6RInstruction(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 DecodeL5RInstruction(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 DecodeL4RSrcDstInstruction(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 DecodeL4RSrcDstSrcDstInstruction(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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#include "XCoreGenDisassemblerTables.inc"
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static DecodeStatus DecodeGRRegsRegisterClass(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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{
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if (RegNo > 11)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, XCore::GRRegsRegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeRRegsRegisterClass(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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{
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if (RegNo > 15)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, XCore::RRegsRegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder) {
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if (Val > 11)
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return MCDisassembler::Fail;
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static unsigned Values[] = {
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32 /*bpw*/, 1, 2, 3, 4, 5, 6, 7, 8, 16, 24, 32
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};
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Inst.addOperand(MCOperand::CreateImm(Values[Val]));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeNegImmOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder) {
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Inst.addOperand(MCOperand::CreateImm(-(int64_t)Val));
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return MCDisassembler::Success;
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}
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static DecodeStatus
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Decode2OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2) {
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unsigned Combined = fieldFromInstruction(Insn, 6, 5);
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if (Combined < 27)
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return MCDisassembler::Fail;
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if (fieldFromInstruction(Insn, 5, 1)) {
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if (Combined == 31)
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return MCDisassembler::Fail;
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Combined += 5;
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}
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Combined -= 27;
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unsigned Op1High = Combined % 3;
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unsigned Op2High = Combined / 3;
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Op1 = (Op1High << 2) | fieldFromInstruction(Insn, 2, 2);
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Op2 = (Op2High << 2) | fieldFromInstruction(Insn, 0, 2);
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return MCDisassembler::Success;
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}
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static DecodeStatus
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Decode3OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2,
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unsigned &Op3) {
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unsigned Combined = fieldFromInstruction(Insn, 6, 5);
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if (Combined >= 27)
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return MCDisassembler::Fail;
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unsigned Op1High = Combined % 3;
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unsigned Op2High = (Combined / 3) % 3;
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unsigned Op3High = Combined / 9;
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Op1 = (Op1High << 2) | fieldFromInstruction(Insn, 4, 2);
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Op2 = (Op2High << 2) | fieldFromInstruction(Insn, 2, 2);
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Op3 = (Op3High << 2) | fieldFromInstruction(Insn, 0, 2);
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return MCDisassembler::Success;
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}
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static DecodeStatus
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Decode2OpInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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// Try and decode as a 3R instruction.
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unsigned Opcode = fieldFromInstruction(Insn, 11, 5);
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switch (Opcode) {
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case 0x0:
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Inst.setOpcode(XCore::STW_2rus);
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return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
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case 0x1:
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Inst.setOpcode(XCore::LDW_2rus);
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return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
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case 0x2:
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Inst.setOpcode(XCore::ADD_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x3:
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Inst.setOpcode(XCore::SUB_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x4:
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Inst.setOpcode(XCore::SHL_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x5:
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Inst.setOpcode(XCore::SHR_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x6:
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Inst.setOpcode(XCore::EQ_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x7:
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Inst.setOpcode(XCore::AND_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x8:
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Inst.setOpcode(XCore::OR_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x9:
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Inst.setOpcode(XCore::LDW_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x10:
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Inst.setOpcode(XCore::LD16S_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x11:
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Inst.setOpcode(XCore::LD8U_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x12:
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Inst.setOpcode(XCore::ADD_2rus);
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return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
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case 0x13:
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Inst.setOpcode(XCore::SUB_2rus);
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return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
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case 0x14:
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Inst.setOpcode(XCore::SHL_2rus);
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return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
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case 0x15:
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Inst.setOpcode(XCore::SHR_2rus);
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return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
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case 0x16:
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Inst.setOpcode(XCore::EQ_2rus);
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return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
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case 0x17:
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Inst.setOpcode(XCore::TSETR_3r);
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return Decode3RImmInstruction(Inst, Insn, Address, Decoder);
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case 0x18:
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Inst.setOpcode(XCore::LSS_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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case 0x19:
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Inst.setOpcode(XCore::LSU_3r);
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return Decode3RInstruction(Inst, Insn, Address, Decoder);
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}
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return MCDisassembler::Fail;
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}
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static DecodeStatus
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Decode2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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Decode2RImmInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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Inst.addOperand(MCOperand::CreateImm(Op1));
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DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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DecodeR2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op2, Op1);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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DecodeRUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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Inst.addOperand(MCOperand::CreateImm(Op2));
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return S;
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}
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static DecodeStatus
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DecodeRUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeBitpOperand(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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DecodeRUSSrcDstBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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unsigned Op1, Op2;
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DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
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if (S != MCDisassembler::Success)
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return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
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DecodeBitpOperand(Inst, Op2, Address, Decoder);
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return S;
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}
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static DecodeStatus
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DecodeL2OpInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address,
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const void *Decoder) {
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// Try and decode as a L3R / L2RUS instruction.
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unsigned Opcode = fieldFromInstruction(Insn, 16, 4) |
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fieldFromInstruction(Insn, 27, 5) << 4;
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switch (Opcode) {
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case 0x0c:
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Inst.setOpcode(XCore::STW_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x1c:
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Inst.setOpcode(XCore::XOR_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x2c:
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Inst.setOpcode(XCore::ASHR_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x3c:
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Inst.setOpcode(XCore::LDAWF_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x4c:
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Inst.setOpcode(XCore::LDAWB_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x5c:
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Inst.setOpcode(XCore::LDA16F_l3r);
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return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
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case 0x6c:
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Inst.setOpcode(XCore::LDA16B_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x7c:
|
|
Inst.setOpcode(XCore::MUL_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x8c:
|
|
Inst.setOpcode(XCore::DIVS_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x9c:
|
|
Inst.setOpcode(XCore::DIVU_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x10c:
|
|
Inst.setOpcode(XCore::ST16_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x11c:
|
|
Inst.setOpcode(XCore::ST8_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x12c:
|
|
Inst.setOpcode(XCore::ASHR_l2rus);
|
|
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x12d:
|
|
Inst.setOpcode(XCore::OUTPW_l2rus);
|
|
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x12e:
|
|
Inst.setOpcode(XCore::INPW_l2rus);
|
|
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x13c:
|
|
Inst.setOpcode(XCore::LDAWF_l2rus);
|
|
return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x14c:
|
|
Inst.setOpcode(XCore::LDAWB_l2rus);
|
|
return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x15c:
|
|
Inst.setOpcode(XCore::CRC_l3r);
|
|
return DecodeL3RSrcDstInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x18c:
|
|
Inst.setOpcode(XCore::REMS_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
case 0x19c:
|
|
Inst.setOpcode(XCore::REMU_l3r);
|
|
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
|
|
}
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2;
|
|
DecodeStatus S = Decode2OpInstruction(fieldFromInstruction(Insn, 0, 16),
|
|
Op1, Op2);
|
|
if (S != MCDisassembler::Success)
|
|
return DecodeL2OpInstructionFail(Inst, Insn, Address, Decoder);
|
|
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeLR2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2;
|
|
DecodeStatus S = Decode2OpInstruction(fieldFromInstruction(Insn, 0, 16),
|
|
Op1, Op2);
|
|
if (S != MCDisassembler::Success)
|
|
return DecodeL2OpInstructionFail(Inst, Insn, Address, Decoder);
|
|
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
Decode3RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
Decode3RImmInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
Inst.addOperand(MCOperand::CreateImm(Op1));
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
Decode2RUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
Inst.addOperand(MCOperand::CreateImm(Op3));
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeBitpOperand(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL3RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
Inst.addOperand(MCOperand::CreateImm(Op3));
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeBitpOperand(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL6RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3, Op4, Op5, Op6;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S != MCDisassembler::Success)
|
|
return S;
|
|
S = Decode3OpInstruction(fieldFromInstruction(Insn, 16, 16), Op4, Op5, Op6);
|
|
if (S != MCDisassembler::Success)
|
|
return S;
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op5, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op6, Address, Decoder);
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL5RInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
// Try and decode as a L6R instruction.
|
|
Inst.clear();
|
|
unsigned Opcode = fieldFromInstruction(Insn, 27, 5);
|
|
switch (Opcode) {
|
|
case 0x00:
|
|
Inst.setOpcode(XCore::LMUL_l6r);
|
|
return DecodeL6RInstruction(Inst, Insn, Address, Decoder);
|
|
}
|
|
return MCDisassembler::Fail;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL5RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3, Op4, Op5;
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S != MCDisassembler::Success)
|
|
return DecodeL5RInstructionFail(Inst, Insn, Address, Decoder);
|
|
S = Decode2OpInstruction(fieldFromInstruction(Insn, 16, 16), Op4, Op5);
|
|
if (S != MCDisassembler::Success)
|
|
return DecodeL5RInstructionFail(Inst, Insn, Address, Decoder);
|
|
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op5, Address, Decoder);
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
unsigned Op4 = fieldFromInstruction(Insn, 16, 4);
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
S = DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
}
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
static DecodeStatus
|
|
DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
|
|
const void *Decoder) {
|
|
unsigned Op1, Op2, Op3;
|
|
unsigned Op4 = fieldFromInstruction(Insn, 16, 4);
|
|
DecodeStatus S =
|
|
Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
S = DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
}
|
|
if (S == MCDisassembler::Success) {
|
|
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
|
|
DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
|
|
}
|
|
return S;
|
|
}
|
|
|
|
MCDisassembler::DecodeStatus
|
|
XCoreDisassembler::getInstruction(MCInst &instr,
|
|
uint64_t &Size,
|
|
const MemoryObject &Region,
|
|
uint64_t Address,
|
|
raw_ostream &vStream,
|
|
raw_ostream &cStream) const {
|
|
uint16_t insn16;
|
|
|
|
if (!readInstruction16(Region, Address, Size, insn16)) {
|
|
return Fail;
|
|
}
|
|
|
|
// Calling the auto-generated decoder function.
|
|
DecodeStatus Result = decodeInstruction(DecoderTable16, instr, insn16,
|
|
Address, this, STI);
|
|
if (Result != Fail) {
|
|
Size = 2;
|
|
return Result;
|
|
}
|
|
|
|
uint32_t insn32;
|
|
|
|
if (!readInstruction32(Region, Address, Size, insn32)) {
|
|
return Fail;
|
|
}
|
|
|
|
// Calling the auto-generated decoder function.
|
|
Result = decodeInstruction(DecoderTable32, instr, insn32, Address, this, STI);
|
|
if (Result != Fail) {
|
|
Size = 4;
|
|
return Result;
|
|
}
|
|
|
|
return Fail;
|
|
}
|
|
|
|
namespace llvm {
|
|
extern Target TheXCoreTarget;
|
|
}
|
|
|
|
static MCDisassembler *createXCoreDisassembler(const Target &T,
|
|
const MCSubtargetInfo &STI) {
|
|
return new XCoreDisassembler(STI, T.createMCRegInfo(""));
|
|
}
|
|
|
|
extern "C" void LLVMInitializeXCoreDisassembler() {
|
|
// Register the disassembler.
|
|
TargetRegistry::RegisterMCDisassembler(TheXCoreTarget,
|
|
createXCoreDisassembler);
|
|
}
|