/* Capstone Disassembly Engine */

/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2015 */

#include "capstone/ppc.h"

#ifdef CAPSTONE_HAS_POWERPC

#include <stdio.h> // debug

#include <string.h>

#include "../../cs_simple_types.h"

#include "../../Mapping.h"

#include "../../MCDisassembler.h"

#include "../../utils.h"

#include "PPCLinkage.h"

#include "PPCMapping.h"

#include "PPCMCTargetDesc.h"

#define GET_REGINFO_MC_DESC

#include "PPCGenRegisterInfo.inc"

void PPC_init_mri(MCRegisterInfo *MRI)

{

  MCRegisterInfo_InitMCRegisterInfo(MRI, PPCRegDesc, PPC_REG_ENDING, 0, 0,

            PPCMCRegisterClasses,

            ARR_SIZE(PPCMCRegisterClasses), 0, 0,

            PPCRegDiffLists, 0, PPCSubRegIdxLists,

            ARR_SIZE(PPCSubRegIdxLists),

            PPCRegEncodingTable);

}

const char *PPC_reg_name(csh handle, unsigned int reg)

{

  if (reg > PPC_REG_INVALID && reg < PPC_REG_ENDING)

    return PPC_LLVM_getRegisterName(reg);

  return NULL;

}

// given internal insn id, return public instruction info

void PPC_get_insn_id(cs_struct *h, cs_insn *insn, unsigned int id)

{

  // We do this after Instruction disassembly.

}

#ifndef CAPSTONE_DIET

static const char *const insn_name_maps[] = {

#include "PPCGenCSMappingInsnName.inc"

};

static const name_map insn_alias_mnem_map[] = {

#include "PPCGenCSAliasMnemMap.inc"

  { PPC_INS_ALIAS_SLWI, "slwi" },

  { PPC_INS_ALIAS_SRWI, "srwi" },

  { PPC_INS_ALIAS_SLDI, "sldi" },

  { PPC_INS_ALIAS_END, NULL },

};

#endif

const char *PPC_insn_name(csh handle, unsigned int id)

{

#ifndef CAPSTONE_DIET

  if (id < PPC_INS_ALIAS_END && id > PPC_INS_ALIAS_BEGIN) {

    if (id - PPC_INS_ALIAS_BEGIN >= ARR_SIZE(insn_alias_mnem_map))

      return NULL;

    return insn_alias_mnem_map[id - PPC_INS_ALIAS_BEGIN - 1].name;

  }

  if (id >= PPC_INS_ENDING)

    return NULL;

  return insn_name_maps[id];

#else

  return NULL;

#endif

}

#ifndef CAPSTONE_DIET

static const name_map group_name_maps[] = {

  // generic groups

  { PPC_GRP_INVALID, NULL },

  { PPC_GRP_JUMP, "jump" },

  { PPC_GRP_CALL, "call" },

  { PPC_GRP_INT, "int" },

  { PPC_GRP_PRIVILEGE, "privilege" },

  { PPC_GRP_BRANCH_RELATIVE, "branch_relative" },

// architecture-specific groups

#include "PPCGenCSFeatureName.inc"

};

#endif

const char *PPC_group_name(csh handle, unsigned int id)

{

#ifndef CAPSTONE_DIET

  return id2name(group_name_maps, ARR_SIZE(group_name_maps), id);

#else

  return NULL;

#endif

}

const insn_map ppc_insns[] = {

#include "PPCGenCSMappingInsn.inc"

};

void PPC_check_updates_cr0(MCInst *MI)

{

#ifndef CAPSTONE_DIET

  if (!detail_is_set(MI))

    return;

  cs_detail *detail = get_detail(MI);

  for (int i = 0; i < detail->regs_write_count; ++i) {

    if (detail->regs_write[i] == 0)

      return;

    if (detail->regs_write[i] == PPC_REG_CR0) {

      PPC_get_detail(MI)->update_cr0 = true;

      return;

    }

  }

#endif // CAPSTONE_DIET

}

/// Parses and adds the branch predicate information and the BH field.

static void PPC_add_branch_predicates(MCInst *MI, const uint8_t *Bytes,

              size_t BytesLen)

{

  if (!detail_is_set(MI))

    return;

#ifndef CAPSTONE_DIET

  assert(MI && Bytes);

  if (BytesLen < 4)

    return;

  ppc_insn_form form = ppc_insns[MI->Opcode].suppl_info.ppc.form;

  bool b_form = ppc_is_b_form(form);

  if (!(b_form || form == PPC_INSN_FORM_XLFORM_2))

    return;

  uint32_t Inst = readBytes32(MI, Bytes);

  uint8_t bi = 0;

  if (b_form)

    bi = (Inst & PPC_INSN_FORM_B_BI_MASK) >> 16;

  else

    bi = (Inst & PPC_INSN_FORM_XL_BI_MASK) >> 16;

  uint8_t bo = 0;

  if (b_form)

    bo = (Inst & PPC_INSN_FORM_B_BO_MASK) >> 21;

  else

    bo = (Inst & PPC_INSN_FORM_XL_BO_MASK) >> 21;

  PPC_get_detail(MI)->bc.bo = bo;

  PPC_get_detail(MI)->bc.bi = bi;

  PPC_get_detail(MI)->bc.crX_bit = bi % 4;

  PPC_get_detail(MI)->bc.crX = PPC_REG_CR0 + (bi / 4);

  PPC_get_detail(MI)->bc.hint = PPC_get_hint(bo);

  PPC_get_detail(MI)->bc.pred_cr = PPC_get_branch_pred(bi, bo, true);

  PPC_get_detail(MI)->bc.pred_ctr = PPC_get_branch_pred(bi, bo, false);

  if (ppc_is_b_form(form))

    return;

  uint8_t bh = (Inst & PPC_INSN_FORM_XL_BH_MASK) >> 11;

  uint16_t xo = (Inst & PPC_INSN_FORM_XL_XO_MASK) >> 1;

  // Pre-defined values for XO fields (PowerISA v3.1B)

  uint16_t bcctr_xo_field = 528;

  uint16_t bctar_xo_field = 560;

  bool cond = (xo == bcctr_xo_field || xo == bctar_xo_field);

  switch (bh) {

  default:

    assert(0 && "Invalid BH value.");

  case 0b00:

    PPC_get_detail(MI)->bc.bh = cond ? PPC_BH_NO_SUBROUTINE_RET :

               PPC_BH_SUBROUTINE_RET;

    break;

  case 0b01:

    PPC_get_detail(MI)->bc.bh = cond ? PPC_BH_RESERVED :

               PPC_BH_NO_SUBROUTINE_RET;

    break;

  case 0b10:

    PPC_get_detail(MI)->bc.bh = PPC_BH_RESERVED;

    break;

  case 0b11:

    PPC_get_detail(MI)->bc.bh = PPC_BH_NOT_PREDICTABLE;

    break;

  }

#endif // CAPSTONE_DIET

}

void PPC_set_instr_map_data(MCInst *MI, const uint8_t *Bytes, size_t BytesLen)

{

  map_cs_id(MI, ppc_insns, ARR_SIZE(ppc_insns));

  map_implicit_reads(MI, ppc_insns);

  map_implicit_writes(MI, ppc_insns);

  map_groups(MI, ppc_insns);

  PPC_add_branch_predicates(MI, Bytes, BytesLen);

  PPC_check_updates_cr0(MI);

}

/// Inialize PPCs detail.

void PPC_init_cs_detail(MCInst *MI)

{

  if (!detail_is_set(MI))

    return;

  memset(get_detail(MI), 0, offsetof(cs_detail, ppc) + sizeof(cs_ppc));

  PPC_get_detail(MI)->bc.bi = UINT8_MAX;

  PPC_get_detail(MI)->bc.bo = UINT8_MAX;

  PPC_get_detail(MI)->bc.crX = PPC_REG_INVALID;

  PPC_get_detail(MI)->bc.crX_bit = PPC_BI_INVALID;

  PPC_get_detail(MI)->bc.pred_cr = PPC_PRED_INVALID;

  PPC_get_detail(MI)->bc.pred_ctr = PPC_PRED_INVALID;

  PPC_get_detail(MI)->bc.hint = PPC_BR_NOT_GIVEN;

  PPC_get_detail(MI)->bc.bh = PPC_BH_INVALID;

}

void PPC_printer(MCInst *MI, SStream *O, void * /* MCRegisterInfo* */ info)

{

  MI->MRI = (MCRegisterInfo *)info;

  MI->fillDetailOps = detail_is_set(MI);

  MI->flat_insn->usesAliasDetails = map_use_alias_details(MI);

  PPC_LLVM_printInst(MI, MI->address, "", O);

  map_set_alias_id(MI, O, insn_alias_mnem_map,

       ARR_SIZE(insn_alias_mnem_map));

}

bool PPC_getInstruction(csh handle, const uint8_t *bytes, size_t bytes_len,

      MCInst *instr, uint16_t *size, uint64_t address,

      void *info)

{

  PPC_init_cs_detail(instr);

  DecodeStatus result = PPC_LLVM_getInstruction(

    handle, bytes, bytes_len, instr, size, address, info);

  PPC_set_instr_map_data(instr, bytes, bytes_len);

  return result != MCDisassembler_Fail;

}

bool PPC_getFeatureBits(unsigned int mode, unsigned int feature)

{

  if ((feature == PPC_FeatureQPX) && (mode & CS_MODE_QPX) == 0) {

    return false;

  } else if ((feature == PPC_FeatureSPE) && (mode & CS_MODE_SPE) == 0) {

    return false;

  } else if ((feature == PPC_FeatureBookE) &&

       (mode & CS_MODE_BOOKE) == 0) {

    return false;

  } else if ((feature == PPC_FeaturePS) && (mode & CS_MODE_PS) == 0) {

    return false;

  }

  // No AIX support for now.

  if (feature == PPC_FeatureModernAIXAs || feature == PPC_AIXOS)

    return false;

  // TODO Make it optional

  if (feature == PPC_FeatureMSYNC)

    return false;

  // By default support everything

  return true;

}

static const map_insn_ops insn_operands[] = {

#include "PPCGenCSMappingInsnOp.inc"

};

/// @brief Handles memory operands.

/// @param MI The MCInst.

/// @param OpNum The operand index.

static void handle_memory_operand(MCInst *MI, unsigned OpNum)

{

  cs_op_type op_type = map_get_op_type(MI, OpNum) & ~CS_OP_MEM;

  // If this is called from printOperand() we do not know if a

  // register is a base or an offset reg (imm is always disponent).

  // So we assume the base register is always added before the offset register

  // and set the flag appropriately.

  bool is_off_reg =

    ((op_type == CS_OP_REG) &&

     PPC_get_detail_op(MI, 0)->mem.base != PPC_REG_INVALID);

  PPC_set_detail_op_mem(MI, OpNum, MCInst_getOpVal(MI, OpNum),

            is_off_reg);

}

static void add_cs_detail_general(MCInst *MI, ppc_op_group op_group,

          unsigned OpNum)

{

  if (!detail_is_set(MI))

    return;

  switch (op_group) {

  default:

    printf("General operand group %d not handled!\n", op_group);

    return;

  case PPC_OP_GROUP_Operand: {

    cs_op_type op_type = map_get_op_type(MI, OpNum);

    // Check for memory operands emitted via printOperand()

    if (doing_mem(MI) && !(op_type & CS_OP_MEM)) {

      // Close previous memory operand

      set_mem_access(MI, false);

    } else if (doing_mem(MI) || (op_type & CS_OP_MEM)) {

      // The memory operands use printOperand() to

      // emit their register and immediates.

      if (!doing_mem(MI))

        set_mem_access(MI, true);

      handle_memory_operand(MI, OpNum);

      return;

    }

    assert((op_type & CS_OP_MEM) ==

           0); // doing_mem should have been true.

    if (op_type == CS_OP_REG)

      PPC_set_detail_op_reg(MI, OpNum,

                MCInst_getOpVal(MI, OpNum));

    else if (op_type == CS_OP_IMM)

      PPC_set_detail_op_imm(MI, OpNum,

                MCInst_getOpVal(MI, OpNum));

    else

      assert(0 && "Operand type not handled.");

    break;

  }

  case PPC_OP_GROUP_ImmZeroOperand:

  case PPC_OP_GROUP_U1ImmOperand:

  case PPC_OP_GROUP_U2ImmOperand:

  case PPC_OP_GROUP_U3ImmOperand:

  case PPC_OP_GROUP_U4ImmOperand:

  case PPC_OP_GROUP_U5ImmOperand:

  case PPC_OP_GROUP_U6ImmOperand:

  case PPC_OP_GROUP_U7ImmOperand:

  case PPC_OP_GROUP_U8ImmOperand:

  case PPC_OP_GROUP_U10ImmOperand:

  case PPC_OP_GROUP_U12ImmOperand:

    PPC_set_detail_op_imm(MI, OpNum,

              (uint32_t)MCInst_getOpVal(MI, OpNum));

    break;

  case PPC_OP_GROUP_U16ImmOperand:

    if (!MCOperand_isImm(MCInst_getOperand(MI, OpNum)))

      // Handled in printOperand()

      return;

    PPC_set_detail_op_imm(MI, OpNum,

              (uint32_t)MCInst_getOpVal(MI, OpNum));

    break;

  case PPC_OP_GROUP_S5ImmOperand: {

    int Imm = MCOperand_getImm(MCInst_getOperand(MI, (OpNum)));

    Imm = SignExtend32((Imm), 5);

    PPC_set_detail_op_imm(MI, OpNum, Imm);

    break;

  }

  case PPC_OP_GROUP_S12ImmOperand: {

    int64_t Imm = SignExtend64(

      MCOperand_getImm(MCInst_getOperand(MI, (OpNum))), 12);

    if (doing_mem(MI)) {

      PPC_set_detail_op_mem(MI, OpNum, Imm, true);

      break;

    }

    PPC_set_detail_op_imm(MI, OpNum, Imm);

    break;

  }

  case PPC_OP_GROUP_S16ImmOperand: {

    if (!MCOperand_isImm(MCInst_getOperand(MI, OpNum)))

      // Handled in printOperand()

      return;

    int16_t Imm = MCOperand_getImm(MCInst_getOperand(MI, (OpNum)));

    if (doing_mem(MI)) {

      PPC_set_detail_op_mem(MI, OpNum, Imm, true);

      break;

    }

    PPC_set_detail_op_imm(MI, OpNum, Imm);

    break;

  }

  case PPC_OP_GROUP_S34ImmOperand: {

    if (!MCOperand_isImm(MCInst_getOperand(MI, OpNum)))

      // Handled in printOperand()

      return;

    int64_t Imm = MCOperand_getImm(MCInst_getOperand(MI, (OpNum)));

    if (doing_mem(MI)) {

      PPC_set_detail_op_mem(MI, OpNum, Imm, true);

      break;

    }

    PPC_set_detail_op_imm(MI, OpNum, Imm);

    break;

  }

  case PPC_OP_GROUP_ATBitsAsHint: {

    PPC_get_detail(MI)->bc.hint =

      (ppc_br_hint)MCInst_getOpVal(MI, OpNum);

    break;

  }

  case PPC_OP_GROUP_AbsBranchOperand: {

    if (!MCOperand_isImm(MCInst_getOperand(MI, OpNum)))

      // Handled in printOperand()

      return;

    unsigned Val = MCInst_getOpVal(MI, OpNum) << 2;

    int32_t Imm = SignExtend32(Val, 32);

    PPC_get_detail_op(MI, 0)->type = PPC_OP_IMM;

    PPC_get_detail_op(MI, 0)->imm = Imm;

    PPC_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);

    PPC_inc_op_count(MI);

    break;

  }

  case PPC_OP_GROUP_TLSCall:

    // Handled in PPCInstPrinter and printOperand.

    return;

  case PPC_OP_GROUP_crbitm: {

    unsigned CCReg = MCInst_getOpVal(MI, OpNum);

    PPC_set_detail_op_reg(MI, OpNum, CCReg);

    break;

  }

  case PPC_OP_GROUP_BranchOperand: {

    if (!MCOperand_isImm(MCInst_getOperand(MI, (OpNum))))

      // Handled in printOperand()

      return;

    int32_t Imm = SignExtend32(

      ((unsigned)MCInst_getOpVal(MI, (OpNum)) << 2), 32);

    uint64_t Address = MI->address + Imm;

    if (IS_32BIT(MI->csh->mode))

      Address &= 0xffffffff;

    PPC_get_detail_op(MI, 0)->type = PPC_OP_IMM;

    PPC_get_detail_op(MI, 0)->imm = Address;

    PPC_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);

    PPC_inc_op_count(MI);

    break;

  }

  // Memory operands have their `set_mem_access()` calls

  // in PPCInstPrinter.

  case PPC_OP_GROUP_MemRegImm:

  case PPC_OP_GROUP_MemRegReg: {

    // These cases print 0 if the base register is R0.

    // So no printOperand() function is called.

    // We must handle the zero case here.

    unsigned OpNumReg = 0;

    if (op_group == PPC_OP_GROUP_MemRegImm)

      OpNumReg = OpNum + 1;

    else

      OpNumReg = OpNum;

    MCOperand *Op = MCInst_getOperand(MI, OpNumReg);

    if (MCOperand_isReg(Op) && MCOperand_getReg(Op) == PPC_R0) {

      PPC_get_detail_op(MI, 0)->mem.base = PPC_REG_ZERO;

      PPC_get_detail_op(MI, 0)->type = PPC_OP_MEM;

      PPC_get_detail_op(MI, 0)->access =

        map_get_op_access(MI, OpNum);

    }

    break;

  }

  case PPC_OP_GROUP_MemRegImmHash:

  case PPC_OP_GROUP_MemRegImm34:

  case PPC_OP_GROUP_MemRegImm34PCRel:

    // Handled in other printOperand functions.

    break;

  }

}

/// Fills cs_detail with the data of the operand.

/// Calls to this function should not be added by hand! Please checkout the

/// patch `AddCSDetail` of the CppTranslator.

void PPC_add_cs_detail(MCInst *MI, ppc_op_group op_group, va_list args)

{

  if (!detail_is_set(MI) || !map_fill_detail_ops(MI))

    return;

  switch (op_group) {

  default:

    printf("Operand group %d not handled!\n", op_group);

    return;

  case PPC_OP_GROUP_PredicateOperand: {

    unsigned OpNum = va_arg(args, unsigned);

    const char *Modifier = va_arg(args, const char *);

    if ((strcmp(Modifier, "cc") == 0) ||

        (strcmp(Modifier, "pm") == 0)) {

      unsigned Val = MCInst_getOpVal(MI, OpNum);

      unsigned bo = Val & 0x1f;

      unsigned bi = (Val & 0x1e0) >> 5;

      PPC_get_detail(MI)->bc.bo = bo;

      PPC_get_detail(MI)->bc.bi = bi;

      PPC_get_detail(MI)->bc.crX_bit = bi % 4;

      PPC_get_detail(MI)->bc.crX = PPC_REG_CR0 + (bi / 4);

      PPC_get_detail(MI)->bc.pred_cr =

        PPC_get_branch_pred(bi, bo, true);

      PPC_get_detail(MI)->bc.pred_ctr =

        PPC_get_branch_pred(bi, bo, false);

      PPC_get_detail(MI)->bc.hint = PPC_get_hint(bo);

    }

    return;

  }

  case PPC_OP_GROUP_S12ImmOperand:

  case PPC_OP_GROUP_Operand:

  case PPC_OP_GROUP_MemRegReg:

  case PPC_OP_GROUP_U6ImmOperand:

  case PPC_OP_GROUP_U5ImmOperand:

  case PPC_OP_GROUP_MemRegImm:

  case PPC_OP_GROUP_S16ImmOperand:

  case PPC_OP_GROUP_U2ImmOperand:

  case PPC_OP_GROUP_U16ImmOperand:

  case PPC_OP_GROUP_BranchOperand:

  case PPC_OP_GROUP_AbsBranchOperand:

  case PPC_OP_GROUP_U1ImmOperand:

  case PPC_OP_GROUP_TLSCall:

  case PPC_OP_GROUP_U3ImmOperand:

  case PPC_OP_GROUP_S5ImmOperand:

  case PPC_OP_GROUP_MemRegImmHash:

  case PPC_OP_GROUP_U4ImmOperand:

  case PPC_OP_GROUP_U10ImmOperand:

  case PPC_OP_GROUP_crbitm:

  case PPC_OP_GROUP_S34ImmOperand:

  case PPC_OP_GROUP_ImmZeroOperand:

  case PPC_OP_GROUP_MemRegImm34:

  case PPC_OP_GROUP_MemRegImm34PCRel:

  case PPC_OP_GROUP_U8ImmOperand:

  case PPC_OP_GROUP_U12ImmOperand:

  case PPC_OP_GROUP_U7ImmOperand:

  case PPC_OP_GROUP_ATBitsAsHint: {

    unsigned OpNum = va_arg(args, unsigned);

    add_cs_detail_general(MI, op_group, OpNum);

    return;

  }

  }

}

void PPC_set_detail_op_mem(MCInst *MI, unsigned OpNum, uint64_t Val,

         bool is_off_reg)

{

  if (!detail_is_set(MI))

    return;

  assert(map_get_op_type(MI, OpNum) & CS_OP_MEM);

  cs_op_type secondary_type = map_get_op_type(MI, OpNum) & ~CS_OP_MEM;

  switch (secondary_type) {

  default:

    assert(0 && "Secondary type not supported yet.");

  case CS_OP_REG:

    if (is_off_reg) {

      PPC_get_detail_op(MI, 0)->mem.offset = Val;

      if (PPC_get_detail_op(MI, 0)->mem.base != PPC_REG_INVALID)

        set_mem_access(MI, false);

    }  else {

      PPC_get_detail_op(MI, 0)->mem.base = Val;

      if (MCInst_opIsTying(MI, OpNum))

        map_add_implicit_write(MI, MCInst_getOpVal(MI, OpNum));

    }

    break;

  case CS_OP_IMM:

    PPC_get_detail_op(MI, 0)->mem.disp = Val;

    if (PPC_get_detail_op(MI, 0)->mem.base != PPC_REG_INVALID)

      set_mem_access(MI, false);

    break;

  }

  PPC_get_detail_op(MI, 0)->type = PPC_OP_MEM;

  PPC_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);

}

/// Adds a register PPC operand at position OpNum and increases the op_count by

/// one.

void PPC_set_detail_op_reg(MCInst *MI, unsigned OpNum, ppc_reg Reg)

{

  if (!detail_is_set(MI))

    return;

  assert(!(map_get_op_type(MI, OpNum) & CS_OP_MEM));

  assert(map_get_op_type(MI, OpNum) == CS_OP_REG);

  PPC_get_detail_op(MI, 0)->type = PPC_OP_REG;

  PPC_get_detail_op(MI, 0)->reg = Reg;

  PPC_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);

  PPC_inc_op_count(MI);

}

/// Adds an immediate PPC operand at position OpNum and increases the op_count

/// by one.

void PPC_set_detail_op_imm(MCInst *MI, unsigned OpNum, int64_t Imm)

{

  if (!detail_is_set(MI))

    return;

  assert(!(map_get_op_type(MI, OpNum) & CS_OP_MEM));

  assert(map_get_op_type(MI, OpNum) == CS_OP_IMM);

  PPC_get_detail_op(MI, 0)->type = PPC_OP_IMM;

  PPC_get_detail_op(MI, 0)->imm = Imm;

  PPC_get_detail_op(MI, 0)->access = map_get_op_access(MI, OpNum);

  PPC_inc_op_count(MI);

}

void PPC_set_mem_access(MCInst *MI, bool status)

{

  if (!detail_is_set(MI))

    return;

  if ((!status && !doing_mem(MI)) || (status && doing_mem(MI)))

    return; // Nothing to do

  set_doing_mem(MI, status);

  if (status) {

    PPC_get_detail_op(MI, 0)->type = PPC_OP_MEM;

    PPC_get_detail_op(MI, 0)->mem.base = PPC_REG_INVALID;

    PPC_get_detail_op(MI, 0)->mem.offset = PPC_REG_INVALID;

    PPC_get_detail_op(MI, 0)->mem.disp = 0;

#ifndef CAPSTONE_DIET

    uint8_t access =

      map_get_op_access(MI, PPC_get_detail(MI)->op_count);

    PPC_get_detail_op(MI, 0)->access = access;

#endif

  } else {

    // done, select the next operand slot

    PPC_inc_op_count(MI);

  }

}

void PPC_setup_op(cs_ppc_op *op)

{

  memset(op, 0, sizeof(cs_ppc_op));

  op->type = PPC_OP_INVALID;

}

/// Inserts a immediate to the detail operands at @index.

/// Already present operands are moved.

void PPC_insert_detail_op_imm_at(MCInst *MI, unsigned index, int64_t Val,

         cs_ac_type access)

{

  if (!detail_is_set(MI) || !map_fill_detail_ops(MI))

    return;

  assert(PPC_get_detail(MI)->op_count < PPC_NUM_OPS);

  cs_ppc_op op;

  PPC_setup_op(&op);

  op.type = PPC_OP_IMM;

  op.imm = Val;

  op.access = access;

  cs_ppc_op *ops = PPC_get_detail(MI)->operands;

  int i = PPC_get_detail(MI)->op_count - 1;

  for (; i >= 0; --i) {

    ops[i + 1] = ops[i];

    if (i == index)

      break;

  }

  ops[index] = op;

  PPC_inc_op_count(MI);

}

#endif