/* Capstone Disassembly Engine, http://www.capstone-engine.org */

/* By Rot127 <unisono@quyllur.org> 2022-2023 */

#ifndef CS_PPC_INSTRINFO_H

#define CS_PPC_INSTRINFO_H

#include "PPCMCTargetDesc.h"

static bool isVFRegister(unsigned Reg)

{

  return Reg >= PPC_VF0 && Reg <= PPC_VF31;

}

static bool isVRRegister(unsigned Reg)

{

  return Reg >= PPC_V0 && Reg <= PPC_V31;

}

/// getRegNumForOperand - some operands use different numbering schemes

/// for the same registers. For example, a VSX instruction may have any of

/// vs0-vs63 allocated whereas an Altivec instruction could only have

/// vs32-vs63 allocated (numbered as v0-v31). This function returns the actual

/// register number needed for the opcode/operand number combination.

/// The operand number argument will be useful when we need to extend this

/// to instructions that use both Altivec and VSX numbering (for different

/// operands).

static unsigned PPCInstrInfo_getRegNumForOperand(const MCInstrDesc *Desc,

             unsigned Reg, unsigned OpNo)

{

  int16_t regClass = Desc->OpInfo[OpNo].RegClass;

  switch (regClass) {

  // We store F0-F31, VF0-VF31 in MCOperand and it should be F0-F31,

  // VSX32-VSX63 during encoding/disassembling

  case PPC_VSSRCRegClassID:

  case PPC_VSFRCRegClassID:

    if (isVFRegister(Reg))

      return PPC_VSX32 + (Reg - PPC_VF0);

    break;

  // We store VSL0-VSL31, V0-V31 in MCOperand and it should be VSL0-VSL31,

  // VSX32-VSX63 during encoding/disassembling

  case PPC_VSRCRegClassID:

    if (isVRRegister(Reg))

      return PPC_VSX32 + (Reg - PPC_V0);

    break;

  // Other RegClass doesn't need mapping

  default:

    break;

  }

  return Reg;

}

#endif // CS_PPC_INSTRINFO_H