diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2019-12-20 19:53:05 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2019-12-20 19:53:05 +0000 |
commit | 0b57cec536236d46e3dba9bd041533462f33dbb7 (patch) | |
tree | 56229dbdbbf76d18580f72f789003db17246c8d9 /contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp | |
parent | 718ef55ec7785aae63f98f8ca05dc07ed399c16d (diff) |
Notes
Diffstat (limited to 'contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp b/contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp deleted file mode 100644 index 7a8af57961cb..000000000000 --- a/contrib/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp +++ /dev/null @@ -1,359 +0,0 @@ -//===------ PPCDisassembler.cpp - Disassembler for PowerPC ------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// - -#include "MCTargetDesc/PPCMCTargetDesc.h" -#include "TargetInfo/PowerPCTargetInfo.h" -#include "llvm/MC/MCDisassembler/MCDisassembler.h" -#include "llvm/MC/MCFixedLenDisassembler.h" -#include "llvm/MC/MCInst.h" -#include "llvm/MC/MCSubtargetInfo.h" -#include "llvm/Support/Endian.h" -#include "llvm/Support/TargetRegistry.h" - -using namespace llvm; - -DEFINE_PPC_REGCLASSES; - -#define DEBUG_TYPE "ppc-disassembler" - -typedef MCDisassembler::DecodeStatus DecodeStatus; - -namespace { -class PPCDisassembler : public MCDisassembler { - bool IsLittleEndian; - -public: - PPCDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, - bool IsLittleEndian) - : MCDisassembler(STI, Ctx), IsLittleEndian(IsLittleEndian) {} - - DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, - ArrayRef<uint8_t> Bytes, uint64_t Address, - raw_ostream &VStream, - raw_ostream &CStream) const override; -}; -} // end anonymous namespace - -static MCDisassembler *createPPCDisassembler(const Target &T, - const MCSubtargetInfo &STI, - MCContext &Ctx) { - return new PPCDisassembler(STI, Ctx, /*IsLittleEndian=*/false); -} - -static MCDisassembler *createPPCLEDisassembler(const Target &T, - const MCSubtargetInfo &STI, - MCContext &Ctx) { - return new PPCDisassembler(STI, Ctx, /*IsLittleEndian=*/true); -} - -extern "C" void LLVMInitializePowerPCDisassembler() { - // Register the disassembler for each target. - TargetRegistry::RegisterMCDisassembler(getThePPC32Target(), - createPPCDisassembler); - TargetRegistry::RegisterMCDisassembler(getThePPC64Target(), - createPPCDisassembler); - TargetRegistry::RegisterMCDisassembler(getThePPC64LETarget(), - createPPCLEDisassembler); -} - -static DecodeStatus DecodePCRel24BranchTarget(MCInst &Inst, unsigned Imm, - uint64_t Addr, - const void *Decoder) { - int32_t Offset = SignExtend32<24>(Imm); - Inst.addOperand(MCOperand::createImm(Offset)); - return MCDisassembler::Success; -} - -// FIXME: These can be generated by TableGen from the existing register -// encoding values! - -template <std::size_t N> -static DecodeStatus decodeRegisterClass(MCInst &Inst, uint64_t RegNo, - const MCPhysReg (&Regs)[N]) { - assert(RegNo < N && "Invalid register number"); - Inst.addOperand(MCOperand::createReg(Regs[RegNo])); - return MCDisassembler::Success; -} - -static DecodeStatus DecodeCRRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, CRRegs); -} - -static DecodeStatus DecodeCRBITRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, CRBITRegs); -} - -static DecodeStatus DecodeF4RCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, FRegs); -} - -static DecodeStatus DecodeF8RCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, FRegs); -} - -static DecodeStatus DecodeVFRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, VFRegs); -} - -static DecodeStatus DecodeVRRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, VRegs); -} - -static DecodeStatus DecodeVSRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, VSRegs); -} - -static DecodeStatus DecodeVSFRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, VSFRegs); -} - -static DecodeStatus DecodeVSSRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, VSSRegs); -} - -static DecodeStatus DecodeGPRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, RRegs); -} - -static DecodeStatus DecodeGPRC_NOR0RegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, RRegsNoR0); -} - -static DecodeStatus DecodeG8RCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, XRegs); -} - -static DecodeStatus DecodeG8RC_NOX0RegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, XRegsNoX0); -} - -#define DecodePointerLikeRegClass0 DecodeGPRCRegisterClass -#define DecodePointerLikeRegClass1 DecodeGPRC_NOR0RegisterClass - -static DecodeStatus DecodeQFRCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, QFRegs); -} - -static DecodeStatus DecodeSPE4RCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, RRegs); -} - -static DecodeStatus DecodeSPERCRegisterClass(MCInst &Inst, uint64_t RegNo, - uint64_t Address, - const void *Decoder) { - return decodeRegisterClass(Inst, RegNo, SPERegs); -} - -#define DecodeQSRCRegisterClass DecodeQFRCRegisterClass -#define DecodeQBRCRegisterClass DecodeQFRCRegisterClass - -template<unsigned N> -static DecodeStatus decodeUImmOperand(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - assert(isUInt<N>(Imm) && "Invalid immediate"); - Inst.addOperand(MCOperand::createImm(Imm)); - return MCDisassembler::Success; -} - -template<unsigned N> -static DecodeStatus decodeSImmOperand(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - assert(isUInt<N>(Imm) && "Invalid immediate"); - Inst.addOperand(MCOperand::createImm(SignExtend64<N>(Imm))); - return MCDisassembler::Success; -} - -static DecodeStatus decodeMemRIOperands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the memri field (imm, reg), which has the low 16-bits as the - // displacement and the next 5 bits as the register #. - - uint64_t Base = Imm >> 16; - uint64_t Disp = Imm & 0xFFFF; - - assert(Base < 32 && "Invalid base register"); - - switch (Inst.getOpcode()) { - default: break; - case PPC::LBZU: - case PPC::LHAU: - case PPC::LHZU: - case PPC::LWZU: - case PPC::LFSU: - case PPC::LFDU: - // Add the tied output operand. - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - break; - case PPC::STBU: - case PPC::STHU: - case PPC::STWU: - case PPC::STFSU: - case PPC::STFDU: - Inst.insert(Inst.begin(), MCOperand::createReg(RRegsNoR0[Base])); - break; - } - - Inst.addOperand(MCOperand::createImm(SignExtend64<16>(Disp))); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeMemRIXOperands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the memrix field (imm, reg), which has the low 14-bits as the - // displacement and the next 5 bits as the register #. - - uint64_t Base = Imm >> 14; - uint64_t Disp = Imm & 0x3FFF; - - assert(Base < 32 && "Invalid base register"); - - if (Inst.getOpcode() == PPC::LDU) - // Add the tied output operand. - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - else if (Inst.getOpcode() == PPC::STDU) - Inst.insert(Inst.begin(), MCOperand::createReg(RRegsNoR0[Base])); - - Inst.addOperand(MCOperand::createImm(SignExtend64<16>(Disp << 2))); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeMemRIX16Operands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the memrix16 field (imm, reg), which has the low 12-bits as the - // displacement with 16-byte aligned, and the next 5 bits as the register #. - - uint64_t Base = Imm >> 12; - uint64_t Disp = Imm & 0xFFF; - - assert(Base < 32 && "Invalid base register"); - - Inst.addOperand(MCOperand::createImm(SignExtend64<16>(Disp << 4))); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeSPE8Operands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the spe8disp field (imm, reg), which has the low 5-bits as the - // displacement with 8-byte aligned, and the next 5 bits as the register #. - - uint64_t Base = Imm >> 5; - uint64_t Disp = Imm & 0x1F; - - assert(Base < 32 && "Invalid base register"); - - Inst.addOperand(MCOperand::createImm(Disp << 3)); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeSPE4Operands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the spe4disp field (imm, reg), which has the low 5-bits as the - // displacement with 4-byte aligned, and the next 5 bits as the register #. - - uint64_t Base = Imm >> 5; - uint64_t Disp = Imm & 0x1F; - - assert(Base < 32 && "Invalid base register"); - - Inst.addOperand(MCOperand::createImm(Disp << 2)); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeSPE2Operands(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // Decode the spe2disp field (imm, reg), which has the low 5-bits as the - // displacement with 2-byte aligned, and the next 5 bits as the register #. - - uint64_t Base = Imm >> 5; - uint64_t Disp = Imm & 0x1F; - - assert(Base < 32 && "Invalid base register"); - - Inst.addOperand(MCOperand::createImm(Disp << 1)); - Inst.addOperand(MCOperand::createReg(RRegsNoR0[Base])); - return MCDisassembler::Success; -} - -static DecodeStatus decodeCRBitMOperand(MCInst &Inst, uint64_t Imm, - int64_t Address, const void *Decoder) { - // The cr bit encoding is 0x80 >> cr_reg_num. - - unsigned Zeros = countTrailingZeros(Imm); - assert(Zeros < 8 && "Invalid CR bit value"); - - Inst.addOperand(MCOperand::createReg(CRRegs[7 - Zeros])); - return MCDisassembler::Success; -} - -#include "PPCGenDisassemblerTables.inc" - -DecodeStatus PPCDisassembler::getInstruction(MCInst &MI, uint64_t &Size, - ArrayRef<uint8_t> Bytes, - uint64_t Address, raw_ostream &OS, - raw_ostream &CS) const { - // Get the four bytes of the instruction. - Size = 4; - if (Bytes.size() < 4) { - Size = 0; - return MCDisassembler::Fail; - } - - // Read the instruction in the proper endianness. - uint32_t Inst = IsLittleEndian ? support::endian::read32le(Bytes.data()) - : support::endian::read32be(Bytes.data()); - - if (STI.getFeatureBits()[PPC::FeatureQPX]) { - DecodeStatus result = - decodeInstruction(DecoderTableQPX32, MI, Inst, Address, this, STI); - if (result != MCDisassembler::Fail) - return result; - } else if (STI.getFeatureBits()[PPC::FeatureSPE]) { - DecodeStatus result = - decodeInstruction(DecoderTableSPE32, MI, Inst, Address, this, STI); - if (result != MCDisassembler::Fail) - return result; - } - - return decodeInstruction(DecoderTable32, MI, Inst, Address, this, STI); -} - |