/* Disassemble ft32 instructions.

   Copyright (C) 2013-2023 Free Software Foundation, Inc.

   Contributed by FTDI (support@ftdichip.com)

   This file is part of the GNU opcodes library.

   This library is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3, or (at your option)

   any later version.

   It is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public

   License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.  */

#include "sysdep.h"

#include <stdio.h>

#define STATIC_TABLE

#define DEFINE_TABLE

#include "opcode/ft32.h"

#include "disassemble.h"

extern const ft32_opc_info_t ft32_opc_info[];

static fprintf_ftype fpr;

static void *stream;

static int

sign_extend (int bit, int value)

{

  int onebit = (1 << bit);

  return (value & (onebit - 1)) - (value & onebit);

}

static void

ft32_opcode1 (unsigned int iword,

        struct disassemble_info *info)

{

  const ft32_opc_info_t *oo;

  for (oo = ft32_opc_info; oo->name; oo++)

    if ((iword & oo->mask) == oo->bits)

      break;

  if (oo->name)

    {

      int f = oo->fields;

      int imm;

      fpr (stream, "%s", oo->name);

      if (oo->dw)

  fpr (stream, ".%c ", "bsl"[(iword >> FT32_FLD_DW_BIT) & 3]);

      else

  fpr (stream, " ");

      while (f)

  {

    int lobit = f & -f;

    if (f & lobit)

      {

        switch (lobit)

    {

    case  FT32_FLD_CBCRCV:

      /* imm is {CB, CV}  */

      imm = ((iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1)) << 4;

      imm |= ((iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1));

      switch (imm)

        {

        case 0x00: fpr (stream, "nz");  break;

        case 0x01: fpr (stream, "z");   break;

        case 0x10: fpr (stream, "ae");  break;

        case 0x11: fpr (stream, "b");   break;

        case 0x20: fpr (stream, "no");  break;

        case 0x21: fpr (stream, "o");   break;

        case 0x30: fpr (stream, "ns");  break;

        case 0x31: fpr (stream, "s");   break;

        case 0x40: fpr (stream, "lt");  break;

        case 0x41: fpr (stream, "gte"); break;

        case 0x50: fpr (stream, "lte"); break;

        case 0x51: fpr (stream, "gt");  break;

        case 0x60: fpr (stream, "be");  break;

        case 0x61: fpr (stream, "a");   break;

        default:

          fpr (stream, "%d,$r30,%d", (imm >> 4), (imm & 1));

          break;

        }

      break;

    case  FT32_FLD_CB:

      imm = (iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1);

      fpr (stream, "%d", imm);

      break;

    case  FT32_FLD_R_D:

      fpr (stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);

      break;

    case  FT32_FLD_CR:

      imm = (iword >> FT32_FLD_CR_BIT) & ((1 << FT32_FLD_CR_SIZ) - 1);

      fpr (stream, "$r%d", 28 + imm);

      break;

    case  FT32_FLD_CV:

      imm = (iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1);

      fpr (stream, "%d", imm);

      break;

    case  FT32_FLD_R_1:

      fpr (stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);

      break;

    case  FT32_FLD_RIMM:

      imm = (iword >> FT32_FLD_RIMM_BIT) & ((1 << FT32_FLD_RIMM_SIZ) - 1);

      if (imm & 0x400)

        fpr (stream, "%d", sign_extend (9, imm));

      else

        fpr (stream, "$r%d", imm & 0x1f);

      break;

    case  FT32_FLD_R_2:

      fpr (stream, "$r%d", (iword >> FT32_FLD_R_2_BIT) & 0x1f);

      break;

    case  FT32_FLD_K20:

      imm = iword & ((1 << FT32_FLD_K20_SIZ) - 1);

      fpr (stream, "%d", sign_extend (19, imm));

      break;

    case  FT32_FLD_PA:

      imm = (iword & ((1 << FT32_FLD_PA_SIZ) - 1)) << 2;

      info->print_address_func ((bfd_vma) imm, info);

      break;

    case  FT32_FLD_AA:

      imm = iword & ((1 << FT32_FLD_AA_SIZ) - 1);

      info->print_address_func ((1 << 23) | (bfd_vma) imm, info);

      break;

    case  FT32_FLD_K16:

      imm = iword & ((1 << FT32_FLD_K16_SIZ) - 1);

      fpr (stream, "%d", imm);

      break;

    case  FT32_FLD_K15:

      imm = iword & ((1 << FT32_FLD_K15_SIZ) - 1);

      fpr (stream, "%d", sign_extend (14, imm));

      break;

    case  FT32_FLD_R_D_POST:

      fpr (stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);

      break;

    case  FT32_FLD_R_1_POST:

      fpr (stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);

      break;

    default:

      break;

    }

        f &= ~lobit;

        if (f)

    fpr (stream, ",");

      }

  }

    }

  else

    fpr (stream, "!");

}

static void

ft32_opcode (bfd_vma addr ATTRIBUTE_UNUSED,

       unsigned int iword,

       struct disassemble_info *info)

{

  unsigned int sc[2];

  if (ft32_decode_shortcode ((unsigned int) addr, iword, sc))

    {

      ft32_opcode1 (sc[0], info);

      fpr (stream, " ; ");

      ft32_opcode1 (sc[1], info);

    }

  else

    ft32_opcode1 (iword, info);

}

int

print_insn_ft32 (bfd_vma addr, struct disassemble_info *info)

{

  int status;

  stream = info->stream;

  bfd_byte buffer[4];

  unsigned int iword;

  fpr = info->fprintf_func;

  if ((status = info->read_memory_func (addr, buffer, 4, info)))

    goto fail;

  iword = bfd_getl32 (buffer);

  fpr (stream, "%08x ", iword);

  ft32_opcode (addr, iword, info);

  return 4;

 fail:

  info->memory_error_func (status, addr, info);

  return -1;

}