opcodes/ia64-dis.c

   1 /* ia64-dis.c -- Disassemble ia64 instructions
   2    Copyright 1998, 1999, 2000, 2002, 2007 Free Software Foundation, Inc.
   3    Contributed by David Mosberger-Tang <davidm@hpl.hp.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 file; see the file COPYING.  If not, write to the
  19    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include <assert.h>
  23 #include <string.h>
  24
  25 #include "dis-asm.h"
  26 #include "opcode/ia64.h"
  27
  28 #define NELEMS(a)       ((int) (sizeof (a) / sizeof (a[0])))
  29
  30 /* Disassemble ia64 instruction.  */
  31
  32 /* Return the instruction type for OPCODE found in unit UNIT. */
  33
  34 static enum ia64_insn_type
  35 unit_to_type (ia64_insn opcode, enum ia64_unit unit)
  36 {
  37   enum ia64_insn_type type;
  38   int op;
  39
  40   op = IA64_OP (opcode);
  41
  42   if (op >= 8 && (unit == IA64_UNIT_I || unit == IA64_UNIT_M))
  43     {
  44       type = IA64_TYPE_A;
  45     }
  46   else
  47     {
  48       switch (unit)
  49         {
  50         case IA64_UNIT_I:
  51           type = IA64_TYPE_I; break;
  52         case IA64_UNIT_M:
  53           type = IA64_TYPE_M; break;
  54         case IA64_UNIT_B:
  55           type = IA64_TYPE_B; break;
  56         case IA64_UNIT_F:
  57           type = IA64_TYPE_F; break;
  58         case IA64_UNIT_L:
  59         case IA64_UNIT_X:
  60           type = IA64_TYPE_X; break;
  61         default:
  62           type = -1;
  63         }
  64     }
  65   return type;
  66 }
  67
  68 int
  69 print_insn_ia64 (bfd_vma memaddr, struct disassemble_info *info)
  70 {
  71   ia64_insn t0, t1, slot[3], template, s_bit, insn;
  72   int slotnum, j, status, need_comma, retval, slot_multiplier;
  73   const struct ia64_operand *odesc;
  74   const struct ia64_opcode *idesc;
  75   const char *err, *str, *tname;
  76   BFD_HOST_U_64_BIT value;
  77   bfd_byte bundle[16];
  78   enum ia64_unit unit;
  79   char regname[16];
  80
  81   if (info->bytes_per_line == 0)
  82     info->bytes_per_line = 6;
  83   info->display_endian = info->endian;
  84
  85   slot_multiplier = info->bytes_per_line;
  86   retval = slot_multiplier;
  87
  88   slotnum = (((long) memaddr) & 0xf) / slot_multiplier;
  89   if (slotnum > 2)
  90     return -1;
  91
  92   memaddr -= (memaddr & 0xf);
  93   status = (*info->read_memory_func) (memaddr, bundle, sizeof (bundle), info);
  94   if (status != 0)
  95     {
  96       (*info->memory_error_func) (status, memaddr, info);
  97       return -1;
  98     }
  99   /* bundles are always in little-endian byte order */
 100   t0 = bfd_getl64 (bundle);
 101   t1 = bfd_getl64 (bundle + 8);
 102   s_bit = t0 & 1;
 103   template = (t0 >> 1) & 0xf;
 104   slot[0] = (t0 >>  5) & 0x1ffffffffffLL;
 105   slot[1] = ((t0 >> 46) & 0x3ffff) | ((t1 & 0x7fffff) << 18);
 106   slot[2] = (t1 >> 23) & 0x1ffffffffffLL;
 107
 108   tname = ia64_templ_desc[template].name;
 109   if (slotnum == 0)
 110     (*info->fprintf_func) (info->stream, "[%s] ", tname);
 111   else
 112     (*info->fprintf_func) (info->stream, "      ");
 113
 114   unit = ia64_templ_desc[template].exec_unit[slotnum];
 115
 116   if (template == 2 && slotnum == 1)
 117     {
 118       /* skip L slot in MLI template: */
 119       slotnum = 2;
 120       retval += slot_multiplier;
 121     }
 122
 123   insn = slot[slotnum];
 124
 125   if (unit == IA64_UNIT_NIL)
 126     goto decoding_failed;
 127
 128   idesc = ia64_dis_opcode (insn, unit_to_type (insn, unit));
 129   if (idesc == NULL)
 130     goto decoding_failed;
 131
 132   /* print predicate, if any: */
 133
 134   if ((idesc->flags & IA64_OPCODE_NO_PRED)
 135       || (insn & 0x3f) == 0)
 136     (*info->fprintf_func) (info->stream, "      ");
 137   else
 138     (*info->fprintf_func) (info->stream, "(p%02d) ", (int)(insn & 0x3f));
 139
 140   /* now the actual instruction: */
 141
 142   (*info->fprintf_func) (info->stream, "%s", idesc->name);
 143   if (idesc->operands[0])
 144     (*info->fprintf_func) (info->stream, " ");
 145
 146   need_comma = 0;
 147   for (j = 0; j < NELEMS (idesc->operands) && idesc->operands[j]; ++j)
 148     {
 149       odesc = elf64_ia64_operands + idesc->operands[j];
 150
 151       if (need_comma)
 152         (*info->fprintf_func) (info->stream, ",");
 153
 154       if (odesc - elf64_ia64_operands == IA64_OPND_IMMU64)
 155         {
 156           /* special case of 64 bit immediate load: */
 157           value = ((insn >> 13) & 0x7f) | (((insn >> 27) & 0x1ff) << 7)
 158             | (((insn >> 22) & 0x1f) << 16) | (((insn >> 21) & 0x1) << 21)
 159             | (slot[1] << 22) | (((insn >> 36) & 0x1) << 63);
 160         }
 161       else if (odesc - elf64_ia64_operands == IA64_OPND_IMMU62)
 162         {
 163           /* 62-bit immediate for nop.x/break.x */
 164           value = ((slot[1] & 0x1ffffffffffLL) << 21)
 165             | (((insn >> 36) & 0x1) << 20)
 166             | ((insn >> 6) & 0xfffff);
 167         }
 168       else if (odesc - elf64_ia64_operands == IA64_OPND_TGT64)
 169         {
 170           /* 60-bit immediate for long branches. */
 171           value = (((insn >> 13) & 0xfffff)
 172                    | (((insn >> 36) & 1) << 59)
 173                    | (((slot[1] >> 2) & 0x7fffffffffLL) << 20)) << 4;
 174         }
 175       else
 176         {
 177           err = (*odesc->extract) (odesc, insn, &value);
 178           if (err)
 179             {
 180               (*info->fprintf_func) (info->stream, "%s", err);
 181               goto done;
 182             }
 183         }
 184
 185         switch (odesc->class)
 186           {
 187           case IA64_OPND_CLASS_CST:
 188             (*info->fprintf_func) (info->stream, "%s", odesc->str);
 189             break;
 190
 191           case IA64_OPND_CLASS_REG:
 192             if (odesc->str[0] == 'a' && odesc->str[1] == 'r')
 193               {
 194                 switch (value)
 195                   {
 196                   case 0: case 1: case 2: case 3:
 197                   case 4: case 5: case 6: case 7:
 198                     sprintf (regname, "ar.k%u", (unsigned int) value);
 199                     break;
 200                   case 16:      strcpy (regname, "ar.rsc"); break;
 201                   case 17:      strcpy (regname, "ar.bsp"); break;
 202                   case 18:      strcpy (regname, "ar.bspstore"); break;
 203                   case 19:      strcpy (regname, "ar.rnat"); break;
 204                   case 32:      strcpy (regname, "ar.ccv"); break;
 205                   case 36:      strcpy (regname, "ar.unat"); break;
 206                   case 40:      strcpy (regname, "ar.fpsr"); break;
 207                   case 44:      strcpy (regname, "ar.itc"); break;
 208                   case 64:      strcpy (regname, "ar.pfs"); break;
 209                   case 65:      strcpy (regname, "ar.lc"); break;
 210                   case 66:      strcpy (regname, "ar.ec"); break;
 211                   default:
 212                     sprintf (regname, "ar%u", (unsigned int) value);
 213                     break;
 214                   }
 215                 (*info->fprintf_func) (info->stream, "%s", regname);
 216               }
 217             else
 218               (*info->fprintf_func) (info->stream, "%s%d", odesc->str, (int)value);
 219             break;
 220
 221           case IA64_OPND_CLASS_IND:
 222             (*info->fprintf_func) (info->stream, "%s[r%d]", odesc->str, (int)value);
 223             break;
 224
 225           case IA64_OPND_CLASS_ABS:
 226             str = 0;
 227             if (odesc - elf64_ia64_operands == IA64_OPND_MBTYPE4)
 228               switch (value)
 229                 {
 230                 case 0x0: str = "@brcst"; break;
 231                 case 0x8: str = "@mix"; break;
 232                 case 0x9: str = "@shuf"; break;
 233                 case 0xa: str = "@alt"; break;
 234                 case 0xb: str = "@rev"; break;
 235                 }
 236
 237             if (str)
 238               (*info->fprintf_func) (info->stream, "%s", str);
 239             else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_SIGNED)
 240               (*info->fprintf_func) (info->stream, "%lld", (long long) value);
 241             else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_UNSIGNED)
 242               (*info->fprintf_func) (info->stream, "%llu", (long long) value);
 243             else
 244               (*info->fprintf_func) (info->stream, "0x%llx", (long long) value);
 245             break;
 246
 247           case IA64_OPND_CLASS_REL:
 248             (*info->print_address_func) (memaddr + value, info);
 249             break;
 250           }
 251
 252       need_comma = 1;
 253       if (j + 1 == idesc->num_outputs)
 254         {
 255           (*info->fprintf_func) (info->stream, "=");
 256           need_comma = 0;
 257         }
 258     }
 259   if (slotnum + 1 == ia64_templ_desc[template].group_boundary
 260       || ((slotnum == 2) && s_bit))
 261     (*info->fprintf_func) (info->stream, ";;");
 262
 263  done:
 264   ia64_free_opcode ((struct ia64_opcode *)idesc);
 265  failed:
 266   if (slotnum == 2)
 267     retval += 16 - 3*slot_multiplier;
 268   return retval;
 269
 270  decoding_failed:
 271   (*info->fprintf_func) (info->stream, "      data8 %#011llx", (long long) insn);
 272   goto failed;
 273 }