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capstone/arch/XCore/XCoreDisassembler.c

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//===------ XCoreDisassembler.cpp - Disassembler for PowerPC ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2015 */
#ifdef CAPSTONE_HAS_XCORE
#include <stdio.h> // DEBUG
#include <stdlib.h>
#include <string.h>
#include "../../cs_priv.h"
#include "../../utils.h"
#include "XCoreDisassembler.h"
#include "../../MCInst.h"
#include "../../MCInstrDesc.h"
#include "../../MCFixedLenDisassembler.h"
#include "../../MCRegisterInfo.h"
#include "../../MCDisassembler.h"
#include "../../MathExtras.h"
static uint64_t getFeatureBits(int mode)
{
// support everything
return (uint64_t)-1;
}
static bool readInstruction16(const uint8_t *code, size_t code_len, uint16_t *insn)
{
if (code_len < 2)
// insufficient data
return false;
// Encoded as a little-endian 16-bit word in the stream.
*insn = (code[0] << 0) | (code[1] << 8);
return true;
}
static bool readInstruction32(const uint8_t *code, size_t code_len, uint32_t *insn)
{
if (code_len < 4)
// insufficient data
return false;
// Encoded as a little-endian 32-bit word in the stream.
*insn = (code[0] << 0) | (code[1] << 8) | (code[2] << 16) | ((uint32_t) code[3] << 24);
return true;
}
static unsigned getReg(const MCRegisterInfo *MRI, unsigned RC, unsigned RegNo)
{
const MCRegisterClass *rc = MCRegisterInfo_getRegClass(MRI, RC);
return rc->RegsBegin[RegNo];
}
static DecodeStatus DecodeGRRegsRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRRegsRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeBitpOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeNegImmOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode2RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode2RImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeR2RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode2RSrcDstInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRUSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRUSBitpInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRUSSrcDstBitpInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL2RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLR2RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode3RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode3RImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode2RUSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus Decode2RUSBitpInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL3RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL3RSrcDstInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL2RUSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL2RUSBitpInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL6RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL5RInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL4RSrcDstInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeL4RSrcDstSrcDstInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
#include "XCoreGenDisassemblerTables.inc"
#define GET_REGINFO_ENUM
#define GET_REGINFO_MC_DESC
#include "XCoreGenRegisterInfo.inc"
static DecodeStatus DecodeGRRegsRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder)
{
unsigned Reg;
if (RegNo > 11)
return MCDisassembler_Fail;
Reg = getReg(Decoder, XCore_GRRegsRegClassID, RegNo);
MCOperand_CreateReg0(Inst, Reg);
return MCDisassembler_Success;
}
static DecodeStatus DecodeRRegsRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder)
{
unsigned Reg;
if (RegNo > 15)
return MCDisassembler_Fail;
Reg = getReg(Decoder, XCore_RRegsRegClassID, RegNo);
MCOperand_CreateReg0(Inst, Reg);
return MCDisassembler_Success;
}
static DecodeStatus DecodeBitpOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
static const unsigned Values[] = {
32 /*bpw*/, 1, 2, 3, 4, 5, 6, 7, 8, 16, 24, 32
};
if (Val > 11)
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, Values[Val]);
return MCDisassembler_Success;
}
static DecodeStatus DecodeNegImmOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateImm0(Inst, -(int64_t)Val);
return MCDisassembler_Success;
}
static DecodeStatus Decode2OpInstruction(unsigned Insn, unsigned *Op1, unsigned *Op2)
{
unsigned Op1High, Op2High;
unsigned Combined = fieldFromInstruction_4(Insn, 6, 5);
if (Combined < 27)
return MCDisassembler_Fail;
if (fieldFromInstruction_4(Insn, 5, 1)) {
if (Combined == 31)
return MCDisassembler_Fail;
Combined += 5;
}
Combined -= 27;
Op1High = Combined % 3;
Op2High = Combined / 3;
*Op1 = (Op1High << 2) | fieldFromInstruction_4(Insn, 2, 2);
*Op2 = (Op2High << 2) | fieldFromInstruction_4(Insn, 0, 2);
return MCDisassembler_Success;
}
static DecodeStatus Decode3OpInstruction(unsigned Insn,
unsigned *Op1, unsigned *Op2, unsigned *Op3)
{
unsigned Op1High, Op2High, Op3High;
unsigned Combined = fieldFromInstruction_4(Insn, 6, 5);
if (Combined >= 27)
return MCDisassembler_Fail;
Op1High = Combined % 3;
Op2High = (Combined / 3) % 3;
Op3High = Combined / 9;
*Op1 = (Op1High << 2) | fieldFromInstruction_4(Insn, 4, 2);
*Op2 = (Op2High << 2) | fieldFromInstruction_4(Insn, 2, 2);
*Op3 = (Op3High << 2) | fieldFromInstruction_4(Insn, 0, 2);
return MCDisassembler_Success;
}
#define GET_INSTRINFO_ENUM
#include "XCoreGenInstrInfo.inc"
static DecodeStatus Decode2OpInstructionFail(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
// Try and decode as a 3R instruction.
unsigned Opcode = fieldFromInstruction_4(Insn, 11, 5);
switch (Opcode) {
case 0x0:
MCInst_setOpcode(Inst, XCore_STW_2rus);
return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x1:
MCInst_setOpcode(Inst, XCore_LDW_2rus);
return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x2:
MCInst_setOpcode(Inst, XCore_ADD_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x3:
MCInst_setOpcode(Inst, XCore_SUB_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x4:
MCInst_setOpcode(Inst, XCore_SHL_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x5:
MCInst_setOpcode(Inst, XCore_SHR_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x6:
MCInst_setOpcode(Inst, XCore_EQ_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x7:
MCInst_setOpcode(Inst, XCore_AND_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x8:
MCInst_setOpcode(Inst, XCore_OR_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x9:
MCInst_setOpcode(Inst, XCore_LDW_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x10:
MCInst_setOpcode(Inst, XCore_LD16S_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x11:
MCInst_setOpcode(Inst, XCore_LD8U_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x12:
MCInst_setOpcode(Inst, XCore_ADD_2rus);
return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x13:
MCInst_setOpcode(Inst, XCore_SUB_2rus);
return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x14:
MCInst_setOpcode(Inst, XCore_SHL_2rus);
return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
case 0x15:
MCInst_setOpcode(Inst, XCore_SHR_2rus);
return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
case 0x16:
MCInst_setOpcode(Inst, XCore_EQ_2rus);
return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x17:
MCInst_setOpcode(Inst, XCore_TSETR_3r);
return Decode3RImmInstruction(Inst, Insn, Address, Decoder);
case 0x18:
MCInst_setOpcode(Inst, XCore_LSS_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
case 0x19:
MCInst_setOpcode(Inst, XCore_LSU_3r);
return Decode3RInstruction(Inst, Insn, Address, Decoder);
}
return MCDisassembler_Fail;
}
static DecodeStatus Decode2RInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus Decode2RImmInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
MCOperand_CreateImm0(Inst, Op1);
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus DecodeR2RInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op2, &Op1);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus Decode2RSrcDstInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus DecodeRUSInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
MCOperand_CreateImm0(Inst, Op2);
return S;
}
static DecodeStatus DecodeRUSBitpInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeBitpOperand(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus DecodeRUSSrcDstBitpInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2;
DecodeStatus S = Decode2OpInstruction(Insn, &Op1, &Op2);
if (S != MCDisassembler_Success)
return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeBitpOperand(Inst, Op2, Address, Decoder);
return S;
}
static DecodeStatus DecodeL2OpInstructionFail(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
// Try and decode as a L3R / L2RUS instruction.
unsigned Opcode = fieldFromInstruction_4(Insn, 16, 4) |
fieldFromInstruction_4(Insn, 27, 5) << 4;
switch (Opcode) {
case 0x0c:
MCInst_setOpcode(Inst, XCore_STW_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x1c:
MCInst_setOpcode(Inst, XCore_XOR_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x2c:
MCInst_setOpcode(Inst, XCore_ASHR_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x3c:
MCInst_setOpcode(Inst, XCore_LDAWF_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x4c:
MCInst_setOpcode(Inst, XCore_LDAWB_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x5c:
MCInst_setOpcode(Inst, XCore_LDA16F_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x6c:
MCInst_setOpcode(Inst, XCore_LDA16B_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x7c:
MCInst_setOpcode(Inst, XCore_MUL_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x8c:
MCInst_setOpcode(Inst, XCore_DIVS_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x9c:
MCInst_setOpcode(Inst, XCore_DIVU_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x10c:
MCInst_setOpcode(Inst, XCore_ST16_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x11c:
MCInst_setOpcode(Inst, XCore_ST8_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x12c:
MCInst_setOpcode(Inst, XCore_ASHR_l2rus);
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
case 0x12d:
MCInst_setOpcode(Inst, XCore_OUTPW_l2rus);
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
case 0x12e:
MCInst_setOpcode(Inst, XCore_INPW_l2rus);
return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
case 0x13c:
MCInst_setOpcode(Inst, XCore_LDAWF_l2rus);
return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x14c:
MCInst_setOpcode(Inst, XCore_LDAWB_l2rus);
return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
case 0x15c:
MCInst_setOpcode(Inst, XCore_CRC_l3r);
return DecodeL3RSrcDstInstruction(Inst, Insn, Address, Decoder);
case 0x18c:
MCInst_setOpcode(Inst, XCore_REMS_l3r);
return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
case 0x19c:
MCInst_setOpcode(Inst, 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_4(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_4(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) {
MCOperand_CreateImm0(Inst, 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);
MCOperand_CreateImm0(Inst, 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_4(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_4(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_4(Insn, 0, 16), &Op1, &Op2, &Op3);
if (S == MCDisassembler_Success) {
DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
MCOperand_CreateImm0(Inst, Op3);
}
return S;
}
static DecodeStatus DecodeL2RUSBitpInstruction(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Op1, Op2, Op3;
DecodeStatus S =
Decode3OpInstruction(fieldFromInstruction_4(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_4(Insn, 0, 16), &Op1, &Op2, &Op3);
if (S != MCDisassembler_Success)
return S;
S = Decode3OpInstruction(fieldFromInstruction_4(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)
{
unsigned Opcode;
// Try and decode as a L6R instruction.
MCInst_clear(Inst);
Opcode = fieldFromInstruction_4(Insn, 27, 5);
switch (Opcode) {
default:
break;
case 0x00:
MCInst_setOpcode(Inst, 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_4(Insn, 0, 16), &Op1, &Op2, &Op3);
if (S != MCDisassembler_Success)
return DecodeL5RInstructionFail(Inst, Insn, Address, Decoder);
S = Decode2OpInstruction(fieldFromInstruction_4(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_4(Insn, 16, 4);
DecodeStatus S =
Decode3OpInstruction(fieldFromInstruction_4(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_4(Insn, 16, 4);
DecodeStatus S =
Decode3OpInstruction(fieldFromInstruction_4(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;
}
#define GET_SUBTARGETINFO_ENUM
#include "XCoreGenInstrInfo.inc"
bool XCore_getInstruction(csh ud, const uint8_t *code, size_t code_len, MCInst *MI,
uint16_t *size, uint64_t address, void *info)
{
uint16_t insn16;
uint32_t insn32;
DecodeStatus Result;
if (!readInstruction16(code, code_len, &insn16)) {
return false;
}
if (MI->flat_insn->detail) {
memset(MI->flat_insn->detail, 0, offsetof(cs_detail, xcore)+sizeof(cs_xcore));
}
// Calling the auto-generated decoder function.
Result = decodeInstruction_2(DecoderTable16, MI, insn16, address, info, 0);
if (Result != MCDisassembler_Fail) {
*size = 2;
return true;
}
if (!readInstruction32(code, code_len, &insn32)) {
return false;
}
// Calling the auto-generated decoder function.
Result = decodeInstruction_4(DecoderTable32, MI, insn32, address, info, 0);
if (Result != MCDisassembler_Fail) {
*size = 4;
return true;
}
return false;
}
void XCore_init(MCRegisterInfo *MRI)
{
/*
InitMCRegisterInfo(XCoreRegDesc, 17, RA, PC,
XCoreMCRegisterClasses, 2,
XCoreRegUnitRoots,
16,
XCoreRegDiffLists,
XCoreRegStrings,
XCoreSubRegIdxLists,
1,
XCoreSubRegIdxRanges,
XCoreRegEncodingTable);
*/
MCRegisterInfo_InitMCRegisterInfo(MRI, XCoreRegDesc, 17,
0, 0,
XCoreMCRegisterClasses, 2,
0, 0,
XCoreRegDiffLists,
0,
XCoreSubRegIdxLists, 1,
0);
}
#endif