opcodes/ft32-dis.c

   1 /* Disassemble ft32 instructions.
   2    Copyright (C) 2013-2016 Free Software Foundation, Inc.
   3    Contributed by FTDI (support@ftdichip.com)
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include <stdio.h>
  24 #define STATIC_TABLE
  25 #define DEFINE_TABLE
  26
  27 #include "opcode/ft32.h"
  28 #include "dis-asm.h"
  29
  30 extern const ft32_opc_info_t ft32_opc_info[128];
  31
  32 static fprintf_ftype fpr;
  33 static void *stream;
  34
  35 int
  36 print_insn_ft32 (bfd_vma addr, struct disassemble_info *info)
  37 {
  38   int status;
  39   stream = info->stream;
  40   bfd_byte buffer[4];
  41   unsigned int iword;
  42   const ft32_opc_info_t *oo;
  43
  44   fpr = info->fprintf_func;
  45
  46   if ((status = info->read_memory_func (addr, buffer, 4, info)))
  47     goto fail;
  48
  49   iword = bfd_getl32 (buffer);
  50
  51   for (oo = ft32_opc_info; oo->name; oo++)
  52     if ((iword & oo->mask) == oo->bits)
  53       break;
  54
  55   if (oo->name)
  56     {
  57       int f = oo->fields;
  58       int imm;
  59
  60       fpr (stream, "%08x %s", iword, oo->name);
  61       if (oo->dw)
  62         {
  63           fpr (stream, ".%c ", "bsl"[(iword >> FT32_FLD_DW_BIT) & 3]);
  64         }
  65       else
  66         {
  67           fpr (stream, " ");
  68         }
  69
  70       while (f)
  71         {
  72           int lobit = f & -f;
  73           if (f & lobit)
  74             {
  75               switch (lobit)
  76               {
  77               case  FT32_FLD_CBCRCV:
  78                 // imm is {CB, CV}
  79                 imm = ((iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1)) << 4;
  80                 imm |= ((iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1));
  81                 switch (imm)
  82                 {
  83                 case 0x00: fpr(stream, "nz");  break;
  84                 case 0x01: fpr(stream, "z");   break;
  85                 case 0x10: fpr(stream, "ae");  break;
  86                 case 0x11: fpr(stream, "b");   break;
  87                 case 0x20: fpr(stream, "no");  break;
  88                 case 0x21: fpr(stream, "o");   break;
  89                 case 0x30: fpr(stream, "ns");  break;
  90                 case 0x31: fpr(stream, "s");   break;
  91                 case 0x40: fpr(stream, "lt");  break;
  92                 case 0x41: fpr(stream, "gte"); break;
  93                 case 0x50: fpr(stream, "lte"); break;
  94                 case 0x51: fpr(stream, "gt");  break;
  95                 case 0x60: fpr(stream, "be");  break;
  96                 case 0x61: fpr(stream, "a");   break;
  97                 default:   fpr(stream, "%d,$r30,%d", (imm >> 4), (imm & 1)); break;
  98                 }
  99                 break;
 100               case  FT32_FLD_CB:
 101                 imm = (iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1);
 102                 fpr(stream, "%d", imm);
 103                 break;
 104               case  FT32_FLD_R_D:
 105                 fpr(stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);
 106                 break;
 107               case  FT32_FLD_CR:
 108                 imm = (iword >> FT32_FLD_CR_BIT) & ((1 << FT32_FLD_CR_SIZ) - 1);
 109                 fpr(stream, "$r%d", 28 + imm);
 110                 break;
 111               case  FT32_FLD_CV:
 112                 imm = (iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1);
 113                 fpr(stream, "%d", imm);
 114                 break;
 115               case  FT32_FLD_R_1:
 116                 fpr(stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);
 117                 break;
 118               case  FT32_FLD_RIMM:
 119                 imm = (iword >> FT32_FLD_RIMM_BIT) & ((1 << FT32_FLD_RIMM_SIZ) - 1);
 120                 if (imm & 0x400)
 121                   info->print_address_func ((bfd_vma) imm & 0x3ff, info);
 122                 else
 123                   fpr(stream, "$r%d", imm & 0x1f);
 124                 break;
 125               case  FT32_FLD_R_2:
 126                 fpr(stream, "$r%d", (iword >> FT32_FLD_R_2_BIT) & 0x1f);
 127                 break;
 128               case  FT32_FLD_K20:
 129                 imm = iword & ((1 << FT32_FLD_K20_SIZ) - 1);
 130                 info->print_address_func ((bfd_vma) imm, info);
 131                 break;
 132               case  FT32_FLD_PA:
 133                 imm = (iword & ((1 << FT32_FLD_PA_SIZ) - 1)) << 2;
 134                 info->print_address_func ((bfd_vma) imm, info);
 135                 break;
 136               case  FT32_FLD_AA:
 137                 imm = iword & ((1 << FT32_FLD_AA_SIZ) - 1);
 138                 info->print_address_func ((bfd_vma) imm, info);
 139                 break;
 140                 break;
 141               case  FT32_FLD_K16:
 142                 imm = iword & ((1 << FT32_FLD_K16_SIZ) - 1);
 143                 info->print_address_func ((bfd_vma) imm, info);
 144                 break;
 145               case  FT32_FLD_K8:
 146                 imm = iword & ((1 << FT32_FLD_K8_SIZ) - 1);
 147                 info->print_address_func ((bfd_vma) imm, info);
 148                 break;
 149                 break;
 150               case  FT32_FLD_R_D_POST:
 151                 fpr(stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);
 152                 break;
 153               case  FT32_FLD_R_1_POST:
 154                 fpr(stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);
 155                 break;
 156               default:
 157                 break;
 158               }
 159               f &= ~lobit;
 160               if (f)
 161                 {
 162                   fpr(stream, ",");
 163                 }
 164             }
 165         }
 166     }
 167     else
 168     {
 169       fpr (stream, "%08x!", iword);
 170     }
 171
 172   return 4;
 173
 174  fail:
 175   info->memory_error_func (status, addr, info);
 176   return -1;
 177 }