opcodes/maxq-dis.c

   1 /* Instruction printing code for the MAXQ
   2
   3    Copyright 2004 Free Software Foundation, Inc.
   4
   5    Written by Vineet Sharma(vineets@noida.hcltech.com) Inderpreet
   6    S.(inderpreetb@noida.hcltech.com)
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify it
  11    under the terms of the GNU General Public License as published by the Free
  12    Software Foundation; either version 2 of the License, or (at your option)
  13    any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  17    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18    for more details.
  19
  20    You should have received a copy of the GNU General Public License along
  21    with this program; if not, write to the Free Software Foundation, Inc., 59
  22    Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "dis-asm.h"
  26 #include "opcode/maxq.h"
  27
  28 struct _group_info
  29 {
  30   unsigned char group_no;
  31   unsigned char sub_opcode;
  32   unsigned char src;
  33   unsigned char dst;
  34   unsigned char fbit;
  35   unsigned char bit_no;
  36   unsigned char flag;
  37
  38 };
  39
  40 typedef struct _group_info group_info;
  41
  42 #define SRC     0x01
  43 #define DST     0x02
  44 #define FORMAT  0x04
  45 #define BIT_NO  0x08
  46 #define SUB_OP  0x10
  47
  48 #define MASK_LOW_BYTE 0x0f
  49 #define MASK_HIGH_BYTE 0xf0
  50
  51 /* Flags for retrieving the bits from the op-code.  */
  52 #define _DECODE_LOWNIB_LOWBYTE  0x000f
  53 #define _DECODE_HIGHNIB_LOWBYTE 0x00f0
  54 #define _DECODE_LOWNIB_HIGHBYTE 0x0f00
  55 #define _DECODE_HIGHNIB_HIGHBYTE 0xf000
  56 #define _DECODE_HIGHBYTE 0xff00
  57 #define _DECODE_LOWBYTE  0x00ff
  58 #define _DECODE_4TO6_HIGHBYTE 0x7000
  59 #define _DECODE_4TO6_LOWBYTE 0x0070
  60 #define _DECODE_0TO6_HIGHBYTE 0x7f00
  61 #define _DECODE_0TO2_HIGHBYTE 0x0700
  62 #define _DECODE_GET_F_HIGHBYTE 0x8000
  63 #define _DECODE_BIT7_HIGHBYTE 0x8000
  64 #define _DECODE_BIT7_LOWBYTE 0x0080
  65 #define _DECODE_GET_CARRY 0x10000
  66 #define _DECODE_BIT0_LOWBYTE 0x1
  67 #define _DECODE_BIT6AND7_HIGHBYTE 0xc000
  68
  69 /* Module and Register Indexed of System Registers.  */
  70 #define _CURR_ACC_MODINDEX 0xa
  71 #define _CURR_ACC_REGINDEX 0x0
  72 #define _PSF_REG_MODINDEX  0x8
  73 #define _PSF_REG_REGINDEX  0x4
  74 #define _PFX_REG_MODINDEX  0xb
  75 #define _PFX0_REG_REGINDEX 0x0
  76 #define _PFX2_REG_REGINDEX 0x2
  77 #define _DP_REG_MODINDEX   0xf
  78 #define _DP0_REG_REGINDEX  0x3
  79 #define _DP1_REG_REGINDEX  0x7
  80 #define _IP_REG_MODINDEX   0xc
  81 #define _IP_REG_REGINDEX   0x0
  82 #define _IIR_REG_MODINDEX  0x8
  83 #define _IIR_REG_REGINDEX  0xb
  84 #define _SP_REG_MODINDEX   0xd
  85 #define _SP_REG_REGINDEX   0x1
  86 #define _IC_REG_MODINDEX   0x8
  87 #define _IC_REG_REGINDEX   0x5
  88 #define _LC_REG_MODINDEX   0xe
  89 #define _LC0_REG_REGINDEX  0x0
  90 #define _LC1_REG_REGINDEX  0x1
  91 #define _LC2_REG_REGINDEX  0x2
  92 #define _LC3_REG_REGINDEX  0x3
  93
  94 /* Flags for finding the bits in PSF Register.  */
  95 #define SIM_ALU_DECODE_CARRY_BIT_POS  0x2
  96 #define SIM_ALU_DECODE_SIGN_BIT_POS   0x40
  97 #define SIM_ALU_DECODE_ZERO_BIT_POS   0x80
  98 #define SIM_ALU_DECODE_EQUAL_BIT_POS  0x1
  99 #define SIM_ALU_DECODE_IGE_BIT_POS    0x1
 100
 101 /* Number Of Op-code Groups.  */
 102 unsigned char const SIM_ALU_DECODE_OPCODE_GROUPS = 11;
 103
 104 /* Op-code Groups.  */
 105 unsigned char const SIM_ALU_DECODE_LOGICAL_XCHG_OP_GROUP = 1;
 106
 107 /* Group1: AND/OR/XOR/ADD/SUB Operations: fxxx 1010 ssss ssss.  */
 108 unsigned char const SIM_ALU_DECODE_AND_OR_ADD_SUB_OP_GROUP = 2;
 109
 110 /* Group2: Logical Operations: 1000 1010 xxxx 1010.  */
 111 unsigned char const SIM_ALU_DECODE_BIT_OP_GROUP = 3;
 112
 113 /* XCHG/Bit Operations: 1xxx 1010 xxxx 1010.  */
 114 unsigned char const SIM_ALU_DECODE_SET_DEST_BIT_GROUP = 4;
 115
 116 /* Move value in bit of destination register: 1ddd dddd xbbb 0111.  */
 117 unsigned char const SIM_ALU_DECODE_JUMP_OP_GROUP = 5;
 118
 119 #define JUMP_CHECK(insn)   \
 120    (   ((insn & _DECODE_4TO6_HIGHBYTE) == 0x0000) \
 121     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x2000) \
 122     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x6000) \
 123     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x1000) \
 124     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x5000) \
 125     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x3000) \
 126     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x7000) \
 127     || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x4000) )
 128
 129 /* JUMP operations: fxxx 1100 ssss ssss */
 130 unsigned char const SIM_ALU_DECODE_RET_OP_GROUP = 6;
 131
 132 /* RET Operations: 1xxx 1100 0000 1101 */
 133 unsigned char const SIM_ALU_DECODE_MOVE_SRC_DST_GROUP = 7;
 134
 135 /* Move src into dest register: fddd dddd ssss ssss */
 136 unsigned char const SIM_ALU_DECODE_SET_SRC_BIT_GROUP = 8;
 137
 138 /* Move value in bit of source register: fbbb 0111 ssss ssss */
 139 unsigned char const SIM_ALU_DECODE_DJNZ_CALL_PUSH_OP_GROUP = 9;
 140
 141 /* PUSH, DJNZ and CALL operations: fxxx 1101 ssss ssss */
 142 unsigned char const SIM_ALU_DECODE_POP_OP_GROUP = 10;
 143
 144 /* POP operation: 1ddd dddd 0000 1101 */
 145 unsigned char const SIM_ALU_DECODE_CMP_SRC_OP_GROUP = 11;
 146
 147 /* GLOBAL */
 148 unsigned char unres_reg_name[20];
 149
 150 static unsigned char *
 151 get_reg_name (unsigned char reg_code, type1 arg_pos)
 152 {
 153   unsigned char module;
 154   unsigned char index;
 155   int ix = 0;
 156   reg_entry const *reg_x;
 157   mem_access_syntax const *syntax;
 158   mem_access *mem_acc;
 159
 160   module = 0;
 161   index = 0;
 162   module = (reg_code & MASK_LOW_BYTE);
 163   index = (reg_code & MASK_HIGH_BYTE);
 164   index = index >> 4;
 165
 166   /* Search the system register table.  */
 167   for (reg_x = &system_reg_table[0]; reg_x->reg_name != NULL; ++reg_x)
 168     if ((reg_x->Mod_name == module) && (reg_x->Mod_index == index))
 169       return reg_x->reg_name;
 170
 171   /* Serch pheripheral table.  */
 172   for (ix = 0; ix < num_of_reg; ix++)
 173     {
 174       reg_x = &new_reg_table[ix];
 175
 176       if ((reg_x->Mod_name == module) && (reg_x->Mod_index == index))
 177         return reg_x->reg_name;
 178     }
 179
 180   for (mem_acc = &mem_table[0]; mem_acc->name != NULL || !mem_acc; ++mem_acc)
 181     {
 182       if (reg_code == mem_acc->opcode)
 183         {
 184           for (syntax = mem_access_syntax_table;
 185                mem_access_syntax_table != NULL || mem_access_syntax_table->name;
 186                ++syntax)
 187             if (!strcmp (mem_acc->name, syntax->name))
 188               {
 189                 if ((arg_pos == syntax->type) || (syntax->type == BOTH))
 190                   return mem_acc->name;
 191
 192                 break;
 193               }
 194         }
 195     }
 196
 197   memset (unres_reg_name, 0, 20);
 198   sprintf (unres_reg_name, "%01x%01xh", index, module);
 199
 200   return unres_reg_name;
 201 }
 202
 203 static bfd_boolean
 204 check_move (unsigned char insn0, unsigned char insn8)
 205 {
 206   bfd_boolean first = FALSE;
 207   bfd_boolean second = FALSE;
 208   char *first_reg;
 209   char *second_reg;
 210   reg_entry const *reg_x;
 211   const unsigned char module1 = insn0 & MASK_LOW_BYTE;
 212   const unsigned char index1 = ((insn0 & 0x70) >> 4);
 213   const unsigned char module2 = insn8 & MASK_LOW_BYTE;
 214   const unsigned char index2 = ((insn8 & MASK_HIGH_BYTE) >> 4);
 215
 216   /* DST */
 217   if (((insn0 & MASK_LOW_BYTE) == MASK_LOW_BYTE)
 218       && ((index1 == 0) || (index1 == 1) || (index1 == 2) || (index1 == 5)
 219           || (index1 == 4) || (index1 == 6)))
 220     first = TRUE;
 221
 222   else if (((insn0 & MASK_LOW_BYTE) == 0x0D) && (index1 == 0))
 223     first = TRUE;
 224
 225   else if ((module1 == 0x0E)
 226            && ((index1 == 0) || (index1 == 1) || (index1 == 2)))
 227     first = TRUE;
 228
 229   else
 230     {
 231       for (reg_x = &system_reg_table[0]; reg_x->reg_name != NULL && reg_x;
 232            ++reg_x)
 233         {
 234           if ((reg_x->Mod_name == module1) && (reg_x->Mod_index == index1)
 235               && ((reg_x->rtype == Reg_16W) || (reg_x->rtype == Reg_8W)))
 236             {
 237               /* IP not allowed.  */
 238               if ((reg_x->Mod_name == 0x0C) && (reg_x->Mod_index == 0x00))
 239                 continue;
 240
 241               /* A[AP] not allowed.  */
 242               if ((reg_x->Mod_name == 0x0A) && (reg_x->Mod_index == 0x01))
 243                 continue;
 244               first_reg = reg_x->reg_name;
 245               first = TRUE;
 246               break;
 247             }
 248         }
 249     }
 250
 251   if (!first)
 252     /* No need to check further.  */
 253     return FALSE;
 254
 255   if (insn0 & 0x80)
 256     {
 257       /* SRC */
 258       if (((insn8 & MASK_LOW_BYTE) == MASK_LOW_BYTE)
 259           && ((index2 == 0) || (index2 == 1) || (index2 == 2) || (index2 == 4)
 260               || (index2 == 5) || (index2 == 6)))
 261         second = TRUE;
 262
 263       else if (((insn8 & MASK_LOW_BYTE) == 0x0D) && (index2 == 0))
 264         second = TRUE;
 265
 266       else if ((module2 == 0x0E)
 267                && ((index2 == 0) || (index2 == 1) || (index2 == 2)))
 268         second = TRUE;
 269
 270       else
 271         {
 272           for (reg_x = &system_reg_table[0];
 273                reg_x->reg_name != NULL && reg_x;
 274                ++reg_x)
 275             {
 276               if ((reg_x->Mod_name == (insn8 & MASK_LOW_BYTE))
 277                   && (reg_x->Mod_index == (((insn8 & 0xf0) >> 4))))
 278                 {
 279                   second = TRUE;
 280                   second_reg = reg_x->reg_name;
 281                   break;
 282                 }
 283             }
 284         }
 285
 286       if (second)
 287         {
 288           if ((module1 == 0x0A && index1 == 0x0)
 289               && (module2 == 0x0A && index2 == 0x01))
 290             return FALSE;
 291
 292           return TRUE;
 293         }
 294
 295       return FALSE;
 296     }
 297
 298   return first;
 299 }
 300
 301 static void
 302 maxq_print_arg (MAX_ARG_TYPE              arg,
 303                 struct disassemble_info * info,
 304                 group_info                grp)
 305 {
 306   switch (arg)
 307     {
 308     case FLAG_C:
 309       info->fprintf_func (info->stream, "C");
 310       break;
 311     case FLAG_NC:
 312       info->fprintf_func (info->stream, "NC");
 313       break;
 314
 315     case FLAG_Z:
 316       info->fprintf_func (info->stream, "Z");
 317       break;
 318
 319     case FLAG_NZ:
 320       info->fprintf_func (info->stream, "NZ");
 321       break;
 322
 323     case FLAG_S:
 324       info->fprintf_func (info->stream, "S");
 325       break;
 326
 327     case FLAG_E:
 328       info->fprintf_func (info->stream, "E");
 329       break;
 330
 331     case FLAG_NE:
 332       info->fprintf_func (info->stream, "NE");
 333       break;
 334
 335     case ACC_BIT:
 336       info->fprintf_func (info->stream, "Acc");
 337       if ((grp.flag & BIT_NO) == BIT_NO)
 338         info->fprintf_func (info->stream, ".%d", grp.bit_no);
 339       break;
 340
 341     case A_BIT_0:
 342       info->fprintf_func (info->stream, "#0");
 343       break;
 344     case A_BIT_1:
 345       info->fprintf_func (info->stream, "#1");
 346       break;
 347
 348     default:
 349       break;
 350     }
 351 }
 352
 353 static unsigned char
 354 get_group (const unsigned int insn)
 355 {
 356   if (check_move ((insn >> 8), (insn & _DECODE_LOWBYTE)))
 357     return 8;
 358
 359   if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0A00)
 360     {
 361       /* && condition with sec part added on 26 May for resolving 2 & 3 grp
 362          conflict.  */
 363       if (((insn & _DECODE_LOWNIB_LOWBYTE) == 0x000A)
 364           && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000))
 365         {
 366           if ((insn & _DECODE_HIGHNIB_HIGHBYTE) == 0x8000)
 367             return 2;
 368           else
 369             return 3;
 370         }
 371
 372       return 1;
 373     }
 374   else if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0C00)
 375     {
 376       if (((insn & _DECODE_LOWBYTE) == 0x000D) && JUMP_CHECK (insn)
 377           && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000))
 378         return 6;
 379       else if ((insn & _DECODE_LOWBYTE) == 0x008D)
 380         return 7;
 381
 382       return 5;
 383     }
 384   else if (((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0D00)
 385            && (((insn & _DECODE_4TO6_HIGHBYTE) == 0x3000)
 386                || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x4000)
 387                || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x5000)
 388                || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x0000)))
 389     return 10;
 390
 391   else if ((insn & _DECODE_LOWBYTE) == 0x000D)
 392     return 11;
 393
 394   else if ((insn & _DECODE_LOWBYTE) == 0x008D)
 395     return 12;
 396
 397   else if ((insn & _DECODE_0TO6_HIGHBYTE) == 0x7800)
 398     return 13;
 399
 400   else if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0700)
 401     return 9;
 402
 403   else if (((insn & _DECODE_LOWNIB_LOWBYTE) == 0x0007)
 404            && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000))
 405     return 4;
 406
 407   return 8;
 408 }
 409
 410 static void
 411 get_insn_opcode (const unsigned int insn, group_info *i)
 412 {
 413   static unsigned char pfx_flag = 0;
 414   static unsigned char count_for_pfx = 0;
 415
 416   i->flag ^= i->flag;
 417   i->bit_no ^= i->bit_no;
 418   i->dst ^= i->dst;
 419   i->fbit ^= i->fbit;
 420   i->group_no ^= i->group_no;
 421   i->src ^= i->src;
 422   i->sub_opcode ^= i->sub_opcode;
 423
 424   if (count_for_pfx > 0)
 425     count_for_pfx++;
 426
 427   if (((insn >> 8) == 0x0b) || ((insn >> 8) == 0x2b))
 428     {
 429       pfx_flag = 1;
 430       count_for_pfx = 1;
 431     }
 432
 433   i->group_no = get_group (insn);
 434
 435   if (pfx_flag && (i->group_no == 0x0D) && (count_for_pfx == 2)
 436       && ((insn & _DECODE_0TO6_HIGHBYTE) == 0x7800))
 437     {
 438       i->group_no = 0x08;
 439       count_for_pfx = 0;
 440       pfx_flag ^= pfx_flag;
 441     }
 442
 443   switch (i->group_no)
 444     {
 445     case 1:
 446       i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12);
 447       i->flag |= SUB_OP;
 448       i->src = ((insn & _DECODE_LOWBYTE));
 449       i->flag |= SRC;
 450       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 451       i->flag |= FORMAT;
 452       break;
 453
 454     case 2:
 455       i->sub_opcode = ((insn & _DECODE_HIGHNIB_LOWBYTE) >> 4);
 456       i->flag |= SUB_OP;
 457       break;
 458
 459     case 3:
 460       i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12);
 461       i->flag |= SUB_OP;
 462       i->bit_no = ((insn & _DECODE_HIGHNIB_LOWBYTE) >> 4);
 463       i->flag |= BIT_NO;
 464       break;
 465
 466     case 4:
 467       i->sub_opcode = ((insn & _DECODE_BIT7_LOWBYTE) >> 7);
 468       i->flag |= SUB_OP;
 469       i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8);
 470       i->flag |= DST;
 471       i->bit_no = ((insn & _DECODE_4TO6_LOWBYTE) >> 4);
 472       i->flag |= BIT_NO;
 473       break;
 474
 475     case 5:
 476       i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12);
 477       i->flag |= SUB_OP;
 478       i->src = ((insn & _DECODE_LOWBYTE));
 479       i->flag |= SRC;
 480       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 481       i->flag |= FORMAT;
 482       break;
 483
 484     case 6:
 485       i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12);
 486       i->flag |= SUB_OP;
 487       break;
 488
 489     case 7:
 490       i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12);
 491       i->flag |= SUB_OP;
 492       break;
 493
 494     case 8:
 495       i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8);
 496       i->flag |= DST;
 497       i->src = ((insn & _DECODE_LOWBYTE));
 498       i->flag |= SRC;
 499       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 500       i->flag |= FORMAT;
 501       break;
 502
 503     case 9:
 504       i->sub_opcode = ((insn & _DECODE_0TO2_HIGHBYTE) >> 8);
 505       i->flag |= SUB_OP;
 506       i->bit_no = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12);
 507       i->flag |= BIT_NO;
 508       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 509       i->flag |= FORMAT;
 510       i->src = ((insn & _DECODE_LOWBYTE));
 511       i->flag |= SRC;
 512       break;
 513
 514     case 10:
 515       i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12);
 516       i->flag |= SUB_OP;
 517       i->src = ((insn & _DECODE_LOWBYTE));
 518       i->flag |= SRC;
 519       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 520       i->flag |= FORMAT;
 521       break;
 522
 523     case 11:
 524       i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8);
 525       i->flag |= DST;
 526       break;
 527
 528     case 12:
 529       i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8);
 530       i->flag |= DST;
 531       break;
 532
 533     case 13:
 534       i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12);
 535       i->flag |= SUB_OP;
 536       i->src = ((insn & _DECODE_LOWBYTE));
 537       i->flag |= SRC;
 538       i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15);
 539       i->flag |= FORMAT;
 540       break;
 541
 542     }
 543   return;
 544 }
 545
 546
 547 /* Print one instruction from MEMADDR on INFO->STREAM. Return the size of the
 548    instruction (always 2 on MAXQ20).  */
 549
 550 static int
 551 print_insn (bfd_vma memaddr, struct disassemble_info *info,
 552             enum bfd_endian endianess)
 553 {
 554   /* The raw instruction.  */
 555   unsigned char insn[2], insn0, insn8, derived_code;
 556   unsigned int format;
 557   unsigned int actual_operands;
 558   unsigned int i;
 559   /* The group_info collected/decoded.  */
 560   group_info grp;
 561   MAXQ20_OPCODE_INFO const *opcode;
 562   int status;
 563
 564   format = 0;
 565
 566   status = info->read_memory_func (memaddr, (bfd_byte *) & insn[0], 2, info);
 567
 568   if (status != 0)
 569     {
 570       info->memory_error_func (status, memaddr, info);
 571       return -1;
 572     }
 573
 574   insn8 = insn[1];
 575   insn0 = insn[0];
 576
 577   /* FIXME: Endianness always little.  */
 578   if (endianess == BFD_ENDIAN_BIG)
 579     get_insn_opcode (((insn[0] << 8) | (insn[1])), &grp);
 580   else
 581     get_insn_opcode (((insn[1] << 8) | (insn[0])), &grp);
 582
 583   derived_code = ((grp.group_no << 4) | grp.sub_opcode);
 584
 585   if (insn[0] == 0 && insn[1] == 0)
 586     {
 587       info->fprintf_func (info->stream, "00 00");
 588       return 2;
 589     }
 590
 591   /* The opcode is always in insn0.  */
 592   for (opcode = &op_table[0]; opcode->name != NULL; ++opcode)
 593     {
 594       if (opcode->instr_id == derived_code)
 595         {
 596           if (opcode->instr_id == 0x3D)
 597             {
 598               if ((grp.bit_no == 0) && (opcode->arg[1] != A_BIT_0))
 599                 continue;
 600               if ((grp.bit_no == 1) && (opcode->arg[1] != A_BIT_1))
 601                 continue;
 602               if ((grp.bit_no == 3) && (opcode->arg[0] != 0))
 603                 continue;
 604             }
 605
 606           info->fprintf_func (info->stream, "%s ", opcode->name);
 607
 608           actual_operands = 0;
 609
 610           if ((grp.flag & SRC) == SRC)
 611             actual_operands++;
 612
 613           if ((grp.flag & DST) == DST)
 614             actual_operands++;
 615
 616           /* If Implict FLAG in the Instruction.  */
 617           if ((opcode->op_number > actual_operands)
 618               && !((grp.flag & SRC) == SRC) && !((grp.flag & DST) == DST))
 619             {
 620               for (i = 0; i < opcode->op_number; i++)
 621                 {
 622                   if (i == 1 && (opcode->arg[1] != NO_ARG))
 623                     info->fprintf_func (info->stream, ",");
 624                   maxq_print_arg (opcode->arg[i], info, grp);
 625                 }
 626             }
 627
 628           /* DST is ABSENT in the grp.  */
 629           if ((opcode->op_number > actual_operands)
 630               && ((grp.flag & SRC) == SRC))
 631             {
 632               maxq_print_arg (opcode->arg[0], info, grp);
 633               info->fprintf_func (info->stream, " ");
 634
 635               if (opcode->instr_id == 0xA4)
 636                 info->fprintf_func (info->stream, "LC[0]");
 637
 638               if (opcode->instr_id == 0xA5)
 639                 info->fprintf_func (info->stream, "LC[1]");
 640
 641               if ((grp.flag & SRC) == SRC)
 642                 info->fprintf_func (info->stream, ",");
 643             }
 644
 645           if ((grp.flag & DST) == DST)
 646             {
 647               if ((grp.flag & BIT_NO) == BIT_NO)
 648                 {
 649                   info->fprintf_func (info->stream, " %s.%d",
 650                                       get_reg_name (grp.dst,
 651                                                     (type1) 0 /*DST*/),
 652                                       grp.bit_no);
 653                 }
 654               else
 655                 info->fprintf_func (info->stream, " %s",
 656                                     get_reg_name (grp.dst, (type1) 0));
 657             }
 658
 659           /* SRC is ABSENT in the grp.  */
 660           if ((opcode->op_number > actual_operands)
 661               && ((grp.flag & DST) == DST))
 662             {
 663               info->fprintf_func (info->stream, ",");
 664               maxq_print_arg (opcode->arg[1], info, grp);
 665               info->fprintf_func (info->stream, " ");
 666             }
 667
 668           if ((grp.flag & SRC) == SRC)
 669             {
 670               if ((grp.flag & DST) == DST)
 671                 info->fprintf_func (info->stream, ",");
 672
 673               if ((grp.flag & BIT_NO) == BIT_NO)
 674                 {
 675                   format = opcode->format;
 676
 677                   if ((grp.flag & FORMAT) == FORMAT)
 678                     format = grp.fbit;
 679                   if (format == 1)
 680                     info->fprintf_func (info->stream, " %s.%d",
 681                                         get_reg_name (grp.src,
 682                                                       (type1) 1 /*SRC*/),
 683                                         grp.bit_no);
 684                   if (format == 0)
 685                     info->fprintf_func (info->stream, " #%02xh.%d",
 686                                         grp.src, grp.bit_no);
 687                 }
 688               else
 689                 {
 690                   format = opcode->format;
 691
 692                   if ((grp.flag & FORMAT) == FORMAT)
 693                     format = grp.fbit;
 694                   if (format == 1)
 695                     info->fprintf_func (info->stream, " %s",
 696                                         get_reg_name (grp.src,
 697                                                       (type1) 1 /*SRC*/));
 698                   if (format == 0)
 699                     info->fprintf_func (info->stream, " #%02xh",
 700                                         (grp.src));
 701                 }
 702             }
 703
 704           return 2;
 705         }
 706     }
 707
 708   info->fprintf_func (info->stream, "Unable to Decode :  %02x %02x",
 709                       insn[0], insn[1]);
 710   return 2;
 711 }
 712
 713 int
 714 print_insn_maxq_little (bfd_vma memaddr, struct disassemble_info *info)
 715 {
 716   return print_insn (memaddr, info, BFD_ENDIAN_LITTLE);
 717 }