//===- VEDisassembler.cpp - Disassembler for VE -----------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file is part of the VE Disassembler.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/VEMCTargetDesc.h"
#include "TargetInfo/VETargetInfo.h"
#include "VE.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCFixedLenDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
#define DEBUG_TYPE "ve-disassembler"
typedef MCDisassembler::DecodeStatus DecodeStatus;
namespace {
/// A disassembler class for VE.
class VEDisassembler : public MCDisassembler {
public:
VEDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
: MCDisassembler(STI, Ctx) {}
virtual ~VEDisassembler() {}
DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &CStream) const override;
};
} // namespace
static MCDisassembler *createVEDisassembler(const Target &T,
const MCSubtargetInfo &STI,
MCContext &Ctx) {
return new VEDisassembler(STI, Ctx);
}
extern "C" void LLVMInitializeVEDisassembler() {
// Register the disassembler.
TargetRegistry::RegisterMCDisassembler(getTheVETarget(),
createVEDisassembler);
}
static const unsigned I32RegDecoderTable[] = {
VE::SW0, VE::SW1, VE::SW2, VE::SW3, VE::SW4, VE::SW5, VE::SW6,
VE::SW7, VE::SW8, VE::SW9, VE::SW10, VE::SW11, VE::SW12, VE::SW13,
VE::SW14, VE::SW15, VE::SW16, VE::SW17, VE::SW18, VE::SW19, VE::SW20,
VE::SW21, VE::SW22, VE::SW23, VE::SW24, VE::SW25, VE::SW26, VE::SW27,
VE::SW28, VE::SW29, VE::SW30, VE::SW31, VE::SW32, VE::SW33, VE::SW34,
VE::SW35, VE::SW36, VE::SW37, VE::SW38, VE::SW39, VE::SW40, VE::SW41,
VE::SW42, VE::SW43, VE::SW44, VE::SW45, VE::SW46, VE::SW47, VE::SW48,
VE::SW49, VE::SW50, VE::SW51, VE::SW52, VE::SW53, VE::SW54, VE::SW55,
VE::SW56, VE::SW57, VE::SW58, VE::SW59, VE::SW60, VE::SW61, VE::SW62,
VE::SW63};
static const unsigned I64RegDecoderTable[] = {
VE::SX0, VE::SX1, VE::SX2, VE::SX3, VE::SX4, VE::SX5, VE::SX6,
VE::SX7, VE::SX8, VE::SX9, VE::SX10, VE::SX11, VE::SX12, VE::SX13,
VE::SX14, VE::SX15, VE::SX16, VE::SX17, VE::SX18, VE::SX19, VE::SX20,
VE::SX21, VE::SX22, VE::SX23, VE::SX24, VE::SX25, VE::SX26, VE::SX27,
VE::SX28, VE::SX29, VE::SX30, VE::SX31, VE::SX32, VE::SX33, VE::SX34,
VE::SX35, VE::SX36, VE::SX37, VE::SX38, VE::SX39, VE::SX40, VE::SX41,
VE::SX42, VE::SX43, VE::SX44, VE::SX45, VE::SX46, VE::SX47, VE::SX48,
VE::SX49, VE::SX50, VE::SX51, VE::SX52, VE::SX53, VE::SX54, VE::SX55,
VE::SX56, VE::SX57, VE::SX58, VE::SX59, VE::SX60, VE::SX61, VE::SX62,
VE::SX63};
static const unsigned F32RegDecoderTable[] = {
VE::SF0, VE::SF1, VE::SF2, VE::SF3, VE::SF4, VE::SF5, VE::SF6,
VE::SF7, VE::SF8, VE::SF9, VE::SF10, VE::SF11, VE::SF12, VE::SF13,
VE::SF14, VE::SF15, VE::SF16, VE::SF17, VE::SF18, VE::SF19, VE::SF20,
VE::SF21, VE::SF22, VE::SF23, VE::SF24, VE::SF25, VE::SF26, VE::SF27,
VE::SF28, VE::SF29, VE::SF30, VE::SF31, VE::SF32, VE::SF33, VE::SF34,
VE::SF35, VE::SF36, VE::SF37, VE::SF38, VE::SF39, VE::SF40, VE::SF41,
VE::SF42, VE::SF43, VE::SF44, VE::SF45, VE::SF46, VE::SF47, VE::SF48,
VE::SF49, VE::SF50, VE::SF51, VE::SF52, VE::SF53, VE::SF54, VE::SF55,
VE::SF56, VE::SF57, VE::SF58, VE::SF59, VE::SF60, VE::SF61, VE::SF62,
VE::SF63};
static const unsigned F128RegDecoderTable[] = {
VE::Q0, VE::Q1, VE::Q2, VE::Q3, VE::Q4, VE::Q5, VE::Q6, VE::Q7,
VE::Q8, VE::Q9, VE::Q10, VE::Q11, VE::Q12, VE::Q13, VE::Q14, VE::Q15,
VE::Q16, VE::Q17, VE::Q18, VE::Q19, VE::Q20, VE::Q21, VE::Q22, VE::Q23,
VE::Q24, VE::Q25, VE::Q26, VE::Q27, VE::Q28, VE::Q29, VE::Q30, VE::Q31};
static const unsigned MiscRegDecoderTable[] = {
VE::USRCC, VE::PSW, VE::SAR, VE::NoRegister,
VE::NoRegister, VE::NoRegister, VE::NoRegister, VE::PMMR,
VE::PMCR0, VE::PMCR1, VE::PMCR2, VE::PMCR3,
VE::NoRegister, VE::NoRegister, VE::NoRegister, VE::NoRegister,
VE::PMC0, VE::PMC1, VE::PMC2, VE::PMC3,
VE::PMC4, VE::PMC5, VE::PMC6, VE::PMC7,
VE::PMC8, VE::PMC9, VE::PMC10, VE::PMC11,
VE::PMC12, VE::PMC13, VE::PMC14};
static DecodeStatus DecodeI32RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo > 63)
return MCDisassembler::Fail;
unsigned Reg = I32RegDecoderTable[RegNo];
Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeI64RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo > 63)
return MCDisassembler::Fail;
unsigned Reg = I64RegDecoderTable[RegNo];
Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeF32RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo > 63)
return MCDisassembler::Fail;
unsigned Reg = F32RegDecoderTable[RegNo];
Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeF128RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo % 2 || RegNo > 63)
return MCDisassembler::Fail;
unsigned Reg = F128RegDecoderTable[RegNo / 2];
Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeMISCRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo > 30)
return MCDisassembler::Fail;
unsigned Reg = MiscRegDecoderTable[RegNo];
if (Reg == VE::NoRegister)
return MCDisassembler::Fail;
Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeASX(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLoadI32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeStoreI32(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLoadI64(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeStoreI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLoadF32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeStoreF32(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLoadASI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeStoreASI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeTS1AMI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeTS1AMI32(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeCASI64(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCASI32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCall(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSIMM7(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSIMM32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCCOperand(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRDOperand(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeBranchCondition(MCInst &Inst, uint64_t insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeBranchConditionAlways(MCInst &Inst, uint64_t insn,
uint64_t Address,
const void *Decoder);
#include "VEGenDisassemblerTables.inc"
/// Read four bytes from the ArrayRef and return 32 bit word.
static DecodeStatus readInstruction64(ArrayRef<uint8_t> Bytes, uint64_t Address,
uint64_t &Size, uint64_t &Insn,
bool IsLittleEndian) {
// We want to read exactly 8 Bytes of data.
if (Bytes.size() < 8) {
Size = 0;
return MCDisassembler::Fail;
}
Insn = IsLittleEndian
? ((uint64_t)Bytes[0] << 0) | ((uint64_t)Bytes[1] << 8) |
((uint64_t)Bytes[2] << 16) | ((uint64_t)Bytes[3] << 24) |
((uint64_t)Bytes[4] << 32) | ((uint64_t)Bytes[5] << 40) |
((uint64_t)Bytes[6] << 48) | ((uint64_t)Bytes[7] << 56)
: ((uint64_t)Bytes[7] << 0) | ((uint64_t)Bytes[6] << 8) |
((uint64_t)Bytes[5] << 16) | ((uint64_t)Bytes[4] << 24) |
((uint64_t)Bytes[3] << 32) | ((uint64_t)Bytes[2] << 40) |
((uint64_t)Bytes[1] << 48) | ((uint64_t)Bytes[0] << 56);
return MCDisassembler::Success;
}
DecodeStatus VEDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
ArrayRef<uint8_t> Bytes,
uint64_t Address,
raw_ostream &CStream) const {
uint64_t Insn;
bool isLittleEndian = getContext().getAsmInfo()->isLittleEndian();
DecodeStatus Result =
readInstruction64(Bytes, Address, Size, Insn, isLittleEndian);
if (Result == MCDisassembler::Fail)
return MCDisassembler::Fail;
// Calling the auto-generated decoder function.
Result = decodeInstruction(DecoderTableVE64, Instr, Insn, Address, this, STI);
if (Result != MCDisassembler::Fail) {
Size = 8;
return Result;
}
return MCDisassembler::Fail;
}
typedef DecodeStatus (*DecodeFunc)(MCInst &MI, unsigned RegNo, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeASX(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
unsigned sy = fieldFromInstruction(insn, 40, 7);
bool cy = fieldFromInstruction(insn, 47, 1);
unsigned sz = fieldFromInstruction(insn, 32, 7);
bool cz = fieldFromInstruction(insn, 39, 1);
uint64_t simm32 = SignExtend64<32>(fieldFromInstruction(insn, 0, 32));
DecodeStatus status;
// Decode sz.
if (cz) {
status = DecodeI64RegisterClass(MI, sz, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
} else {
MI.addOperand(MCOperand::createImm(0));
}
// Decode sy.
if (cy) {
status = DecodeI64RegisterClass(MI, sy, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
} else {
MI.addOperand(MCOperand::createImm(SignExtend32<7>(sy)));
}
// Decode simm32.
MI.addOperand(MCOperand::createImm(simm32));
return MCDisassembler::Success;
}
static DecodeStatus DecodeAS(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
unsigned sz = fieldFromInstruction(insn, 32, 7);
bool cz = fieldFromInstruction(insn, 39, 1);
uint64_t simm32 = SignExtend64<32>(fieldFromInstruction(insn, 0, 32));
DecodeStatus status;
// Decode sz.
if (cz) {
status = DecodeI64RegisterClass(MI, sz, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
} else {
MI.addOperand(MCOperand::createImm(0));
}
// Decode simm32.
MI.addOperand(MCOperand::createImm(simm32));
return MCDisassembler::Success;
}
static DecodeStatus DecodeMem(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder, bool isLoad,
DecodeFunc DecodeSX) {
unsigned sx = fieldFromInstruction(insn, 48, 7);
DecodeStatus status;
if (isLoad) {
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
status = DecodeASX(MI, insn, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
if (!isLoad) {
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
return MCDisassembler::Success;
}
static DecodeStatus DecodeMemAS(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder, bool isLoad,
DecodeFunc DecodeSX) {
unsigned sx = fieldFromInstruction(insn, 48, 7);
DecodeStatus status;
if (isLoad) {
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
status = DecodeAS(MI, insn, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
if (!isLoad) {
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
return MCDisassembler::Success;
}
static DecodeStatus DecodeLoadI32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true, DecodeI32RegisterClass);
}
static DecodeStatus DecodeStoreI32(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false, DecodeI32RegisterClass);
}
static DecodeStatus DecodeLoadI64(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true, DecodeI64RegisterClass);
}
static DecodeStatus DecodeStoreI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false, DecodeI64RegisterClass);
}
static DecodeStatus DecodeLoadF32(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true, DecodeF32RegisterClass);
}
static DecodeStatus DecodeStoreF32(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false, DecodeF32RegisterClass);
}
static DecodeStatus DecodeLoadASI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder) {
return DecodeMemAS(Inst, insn, Address, Decoder, true,
DecodeI64RegisterClass);
}
static DecodeStatus DecodeStoreASI64(MCInst &Inst, uint64_t insn,
uint64_t Address, const void *Decoder) {
return DecodeMemAS(Inst, insn, Address, Decoder, false,
DecodeI64RegisterClass);
}
static DecodeStatus DecodeCAS(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder, bool isImmOnly, bool isUImm,
DecodeFunc DecodeSX) {
unsigned sx = fieldFromInstruction(insn, 48, 7);
bool cy = fieldFromInstruction(insn, 47, 1);
unsigned sy = fieldFromInstruction(insn, 40, 7);
// Add $sx.
DecodeStatus status;
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
// Add $disp($sz).
status = DecodeAS(MI, insn, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
// Add $sy.
if (cy && !isImmOnly) {
status = DecodeSX(MI, sy, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
} else {
if (isUImm)
MI.addOperand(MCOperand::createImm(sy));
else
MI.addOperand(MCOperand::createImm(SignExtend32<7>(sy)));
}
// Add $sd.
status = DecodeSX(MI, sx, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
return MCDisassembler::Success;
}
static DecodeStatus DecodeTS1AMI64(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeCAS(MI, insn, Address, Decoder, false, true,
DecodeI64RegisterClass);
}
static DecodeStatus DecodeTS1AMI32(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeCAS(MI, insn, Address, Decoder, false, true,
DecodeI32RegisterClass);
}
static DecodeStatus DecodeCASI64(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeCAS(MI, insn, Address, Decoder, false, false,
DecodeI64RegisterClass);
}
static DecodeStatus DecodeCASI32(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeCAS(MI, insn, Address, Decoder, false, false,
DecodeI32RegisterClass);
}
static DecodeStatus DecodeCall(MCInst &Inst, uint64_t insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true, DecodeI64RegisterClass);
}
static DecodeStatus DecodeSIMM7(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
uint64_t tgt = SignExtend64<7>(insn);
MI.addOperand(MCOperand::createImm(tgt));
return MCDisassembler::Success;
}
static DecodeStatus DecodeSIMM32(MCInst &MI, uint64_t insn, uint64_t Address,
const void *Decoder) {
uint64_t tgt = SignExtend64<32>(insn);
MI.addOperand(MCOperand::createImm(tgt));
return MCDisassembler::Success;
}
static bool isIntegerBCKind(MCInst &MI) {
#define BCm_kind(NAME) \
case NAME##rri: \
case NAME##rzi: \
case NAME##iri: \
case NAME##izi: \
case NAME##rri_nt: \
case NAME##rzi_nt: \
case NAME##iri_nt: \
case NAME##izi_nt: \
case NAME##rri_t: \
case NAME##rzi_t: \
case NAME##iri_t: \
case NAME##izi_t:
#define BCRm_kind(NAME) \
case NAME##rr: \
case NAME##ir: \
case NAME##rr_nt: \
case NAME##ir_nt: \
case NAME##rr_t: \
case NAME##ir_t:
{
using namespace llvm::VE;
switch (MI.getOpcode()) {
BCm_kind(BCFL) BCm_kind(BCFW) BCRm_kind(BRCFL)
BCRm_kind(BRCFW) return true;
}
}
#undef BCm_kind
return false;
}
// Decode CC Operand field.
static DecodeStatus DecodeCCOperand(MCInst &MI, uint64_t cf, uint64_t Address,
const void *Decoder) {
MI.addOperand(MCOperand::createImm(VEValToCondCode(cf, isIntegerBCKind(MI))));
return MCDisassembler::Success;
}
// Decode RD Operand field.
static DecodeStatus DecodeRDOperand(MCInst &MI, uint64_t cf, uint64_t Address,
const void *Decoder) {
MI.addOperand(MCOperand::createImm(VEValToRD(cf)));
return MCDisassembler::Success;
}
// Decode branch condition instruction and CCOperand field in it.
static DecodeStatus DecodeBranchCondition(MCInst &MI, uint64_t insn,
uint64_t Address,
const void *Decoder) {
unsigned cf = fieldFromInstruction(insn, 48, 4);
bool cy = fieldFromInstruction(insn, 47, 1);
unsigned sy = fieldFromInstruction(insn, 40, 7);
// Decode cf.
MI.addOperand(MCOperand::createImm(VEValToCondCode(cf, isIntegerBCKind(MI))));
// Decode sy.
DecodeStatus status;
if (cy) {
status = DecodeI64RegisterClass(MI, sy, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
} else {
MI.addOperand(MCOperand::createImm(SignExtend32<7>(sy)));
}
// Decode MEMri.
return DecodeAS(MI, insn, Address, Decoder);
}
static DecodeStatus DecodeBranchConditionAlways(MCInst &MI, uint64_t insn,
uint64_t Address,
const void *Decoder) {
// Decode MEMri.
return DecodeAS(MI, insn, Address, Decoder);
}
