[binutils.git] / opcodes / z8k-dis.c

/* Disassemble z8000 code.
   Copyright 1992, 1993, 1995, 1998, 2000
   Free Software Foundation, Inc.

This file is part of GNU Binutils.

This program 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 2 of the License, or
(at your option) any later version.

This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "sysdep.h"
#include "dis-asm.h"

#define DEFINE_TABLE
#include "z8k-opc.h"
\f
#include <setjmp.h>
\f
typedef struct
{
  /* These are all indexed by nibble number (i.e only every other entry
     of bytes is used, and every 4th entry of words).  */
  unsigned char nibbles[24];
  unsigned char bytes[24];
  unsigned short words[24];

  /* Nibble number of first word not yet fetched.  */
  int max_fetched;
  bfd_vma insn_start;
  jmp_buf bailout;

  long tabl_index;
  char instr_asmsrc[80];
  unsigned long arg_reg[0x0f];
  unsigned long immediate;
  unsigned long displacement;
  unsigned long address;
  unsigned long cond_code;
  unsigned long ctrl_code;
  unsigned long flags;
  unsigned long interrupts;
}
instr_data_s;

/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
   to ADDR (exclusive) are valid.  Returns 1 for success, longjmps
   on error.  */
#define FETCH_DATA(info, nibble) \
  ((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
   ? 1 : fetch_data ((info), (nibble)))

static int
fetch_data (info, nibble)
     struct disassemble_info *info;
     int nibble;
{
  unsigned char mybuf[20];
  int status;
  instr_data_s *priv = (instr_data_s *) info->private_data;

  if ((nibble % 4) != 0)
    abort ();

  status = (*info->read_memory_func) (priv->insn_start,
				      (bfd_byte *) mybuf,
				      nibble / 2,
				      info);
  if (status != 0)
    {
      (*info->memory_error_func) (status, priv->insn_start, info);
      longjmp (priv->bailout, 1);
    }

  {
    int i;
    unsigned char *p = mybuf;

    for (i = 0; i < nibble;)
      {
	priv->words[i] = (p[0] << 8) | p[1];

	priv->bytes[i] = *p;
	priv->nibbles[i++] = *p >> 4;
	priv->nibbles[i++] = *p & 0xf;

	++p;
	priv->bytes[i] = *p;
	priv->nibbles[i++] = *p >> 4;
	priv->nibbles[i++] = *p & 0xf;

	++p;
      }
  }
  priv->max_fetched = nibble;
  return 1;
}

static char *codes[16] =
{
  "f",
  "lt",
  "le",
  "ule",
  "ov/pe",
  "mi",
  "eq",
  "c/ult",
  "t",
  "ge",
  "gt",
  "ugt",
  "nov/po",
  "pl",
  "ne",
  "nc/uge"
};

int z8k_lookup_instr PARAMS ((unsigned char *, disassemble_info *));
static void output_instr
  PARAMS ((instr_data_s *, unsigned long, disassemble_info *));
static void unpack_instr PARAMS ((instr_data_s *, int, disassemble_info *));
static void unparse_instr PARAMS ((instr_data_s *));

static int
print_insn_z8k (addr, info, is_segmented)
     bfd_vma addr;
     disassemble_info *info;
     int is_segmented;
{
  instr_data_s instr_data;

  info->private_data = (PTR) &instr_data;
  instr_data.max_fetched = 0;
  instr_data.insn_start = addr;
  if (setjmp (instr_data.bailout) != 0)
    /* Error return.  */
    return -1;

  instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
  if (instr_data.tabl_index > 0)
    {
      unpack_instr (&instr_data, is_segmented, info);
      unparse_instr (&instr_data);
      output_instr (&instr_data, addr, info);
      return z8k_table[instr_data.tabl_index].length;
    }
  else
    {
      FETCH_DATA (info, 4);
      (*info->fprintf_func) (info->stream, ".word %02x%02x",
			     instr_data.bytes[0], instr_data.bytes[2]);
      return 2;
    }
}

int
print_insn_z8001 (addr, info)
     bfd_vma addr;
     disassemble_info *info;
{
  return print_insn_z8k (addr, info, 1);
}

int
print_insn_z8002 (addr, info)
     bfd_vma addr;
     disassemble_info *info;
{
  return print_insn_z8k (addr, info, 0);
}

int
z8k_lookup_instr (nibbles, info)
     unsigned char *nibbles;
     disassemble_info *info;
{

  int nibl_index, tabl_index;
  int nibl_matched;
  unsigned short instr_nibl;
  unsigned short tabl_datum, datum_class, datum_value;

  nibl_matched = 0;
  tabl_index = 0;
  while (!nibl_matched && z8k_table[tabl_index].name)
    {
      nibl_matched = 1;
      for (nibl_index = 0;
	   nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
	   nibl_index++)
	{
	  if ((nibl_index % 4) == 0)
	    /* Fetch one word at a time.  */
	    FETCH_DATA (info, nibl_index + 4);
	  instr_nibl = nibbles[nibl_index];

	  tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	  datum_class = tabl_datum & CLASS_MASK;
	  datum_value = ~CLASS_MASK & tabl_datum;

	  switch (datum_class)
	    {
	    case CLASS_BIT:
	      if (datum_value != instr_nibl)
		nibl_matched = 0;
	      break;
	    case CLASS_00II:
	      if (!((~instr_nibl) & 0x4))
		nibl_matched = 0;
	      break;
	    case CLASS_01II:
	      if (!(instr_nibl & 0x4))
		nibl_matched = 0;
	      break;
	    case CLASS_0CCC:
	      if (!((~instr_nibl) & 0x8))
		nibl_matched = 0;
	      break;
	    case CLASS_1CCC:
	      if (!(instr_nibl & 0x8))
		nibl_matched = 0;
	      break;
	    case CLASS_0DISP7:
	      if (!((~instr_nibl) & 0x8))
		nibl_matched = 0;
	      nibl_index += 1;
	      break;
	    case CLASS_1DISP7:
	      if (!(instr_nibl & 0x8))
		nibl_matched = 0;
	      nibl_index += 1;
	      break;
	    case CLASS_REGN0:
	      if (instr_nibl == 0)
		nibl_matched = 0;
	      break;
	    case CLASS_BIT_1OR2:
	      if ((instr_nibl | 0x2) != (datum_value | 0x2))
		nibl_matched = 0;
	      break;
	    default:
	      break;
	    }
	}
      if (nibl_matched)
	{
	  return tabl_index;
	}

      tabl_index++;
    }
  return -1;

}

static void
output_instr (instr_data, addr, info)
     instr_data_s *instr_data;
     unsigned long addr;
     disassemble_info *info;
{
  int loop, loop_limit;
  char tmp_str[20];
  char out_str[100];

  strcpy (out_str, "\t");

  loop_limit = z8k_table[instr_data->tabl_index].length * 2;
  FETCH_DATA (info, loop_limit);
  for (loop = 0; loop < loop_limit; loop++)
    {
      sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
      strcat (out_str, tmp_str);
    }

  while (loop++ < 8)
    {
      strcat (out_str, " ");
    }

  strcat (out_str, instr_data->instr_asmsrc);

  (*info->fprintf_func) (info->stream, "%s", out_str);
}

static void
unpack_instr (instr_data, is_segmented, info)
     instr_data_s *instr_data;
     int is_segmented;
     disassemble_info *info;
{
  int nibl_count, loop;
  unsigned short instr_nibl, instr_byte, instr_word;
  long instr_long;
  unsigned short tabl_datum, datum_class, datum_value;

  nibl_count = 0;
  loop = 0;
  while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
    {
      FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
      instr_nibl = instr_data->nibbles[nibl_count];
      instr_byte = instr_data->bytes[nibl_count];
      instr_word = instr_data->words[nibl_count];

      tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
      datum_class = tabl_datum & CLASS_MASK;
      datum_value = tabl_datum & ~CLASS_MASK;

      switch (datum_class)
	{
	case CLASS_X:
	  instr_data->address = instr_nibl;
	  break;
	case CLASS_BA:
	  instr_data->displacement = instr_nibl;
	  break;
	case CLASS_BX:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_DISP:
	  switch (datum_value)
	    {
	    case ARG_DISP16:
	      instr_data->displacement = instr_word;
	      nibl_count += 3;
	      break;
	    case ARG_DISP12:
	      instr_data->displacement = instr_word & 0x0fff;
	      nibl_count += 2;
	      break;
	    default:
	      break;
	    }
	  break;
	case CLASS_IMM:
	  switch (datum_value)
	    {
	    case ARG_IMM4:
	      instr_data->immediate = instr_nibl;
	      break;
	    case ARG_NIM8:
	      instr_data->immediate = (-instr_byte);
	      nibl_count += 1;
	      break;
	    case ARG_IMM8:
	      instr_data->immediate = instr_byte;
	      nibl_count += 1;
	      break;
	    case ARG_IMM16:
	      instr_data->immediate = instr_word;
	      nibl_count += 3;
	      break;
	    case ARG_IMM32:
	      FETCH_DATA (info, nibl_count + 8);
	      instr_long = (instr_data->words[nibl_count] << 16)
		| (instr_data->words[nibl_count + 4]);
	      instr_data->immediate = instr_long;
	      nibl_count += 7;
	      break;
	    case ARG_IMMN:
	      instr_data->immediate = instr_nibl - 1;
	      break;
	    case ARG_IMM4M1:
	      instr_data->immediate = instr_nibl + 1;
	      break;
	    case ARG_IMM_1:
	      instr_data->immediate = 1;
	      break;
	    case ARG_IMM_2:
	      instr_data->immediate = 2;
	      break;
	    case ARG_IMM2:
	      instr_data->immediate = instr_nibl & 0x3;
	      break;
	    default:
	      break;
	    }
	  break;
	case CLASS_CC:
	  instr_data->cond_code = instr_nibl;
	  break;
	case CLASS_CTRL:
	  instr_data->ctrl_code = instr_nibl;
	  break;
	case CLASS_DA:
	case CLASS_ADDRESS:
	  if (is_segmented)
	    {
	      if (instr_nibl & 0x8)
		{
		  FETCH_DATA (info, nibl_count + 8);
		  instr_long = (instr_data->words[nibl_count] << 16)
		    | (instr_data->words[nibl_count + 4]);
		  instr_data->address = ((instr_word & 0x7f00) << 8) +
		    (instr_long & 0xffff);
		  nibl_count += 7;
		}
	      else
		{
		  instr_data->address = ((instr_word & 0x7f00) << 8) +
		    (instr_word & 0x00ff);
		  nibl_count += 3;
		}
	    }
	  else
	    {
	      instr_data->address = instr_word;
	      nibl_count += 3;
	    }
	  break;
	case CLASS_0CCC:
	  instr_data->cond_code = instr_nibl & 0x7;
	  break;
	case CLASS_1CCC:
	  instr_data->cond_code = instr_nibl & 0x7;
	  break;
	case CLASS_0DISP7:
	  instr_data->displacement = instr_byte & 0x7f;
	  nibl_count += 1;
	  break;
	case CLASS_1DISP7:
	  instr_data->displacement = instr_byte & 0x7f;
	  nibl_count += 1;
	  break;
	case CLASS_01II:
	  instr_data->interrupts = instr_nibl & 0x3;
	  break;
	case CLASS_00II:
	  instr_data->interrupts = instr_nibl & 0x3;
	  break;
	case CLASS_BIT:
	  /* Do nothing.  */
	  break;
	case CLASS_IR:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_FLAGS:
	  instr_data->flags = instr_nibl;
	  break;
	case CLASS_REG:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REG_BYTE:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REG_WORD:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REG_QUAD:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REG_LONG:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REGN0:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	default:
	  break;
	}

      loop += 1;
      nibl_count += 1;
    }
}

static void
unparse_instr (instr_data)
     instr_data_s *instr_data;
{
  unsigned short tabl_datum, datum_class, datum_value;
  int loop, loop_limit;
  char out_str[80], tmp_str[25];

  sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);

  loop_limit = z8k_table[instr_data->tabl_index].noperands;
  for (loop = 0; loop < loop_limit; loop++)
    {
      if (loop)
	strcat (out_str, ",");

      tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
      datum_class = tabl_datum & CLASS_MASK;
      datum_value = tabl_datum & ~CLASS_MASK;

      switch (datum_class)
	{
	case CLASS_X:
	  sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
		   instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_BA:
	  sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
		   instr_data->immediate);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_BX:
	  sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
		   instr_data->arg_reg[ARG_RX]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_DISP:
	  sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_IMM:
	  sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_CC:
	  sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_CTRL:
	  sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_DA:
	case CLASS_ADDRESS:
	  sprintf (tmp_str, "#0x%0lx", instr_data->address);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_IR:
	  sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_FLAGS:
	  sprintf (tmp_str, "0x%0lx", instr_data->flags);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_BYTE:
	  if (instr_data->arg_reg[datum_value] >= 0x8)
	    {
	      sprintf (tmp_str, "rl%ld",
		       instr_data->arg_reg[datum_value] - 0x8);
	    }
	  else
	    {
	      sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
	    }
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_WORD:
	  sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_QUAD:
	  sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_LONG:
	  sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	default:
	  break;
	}
    }

  strcpy (instr_data->instr_asmsrc, out_str);
}
Commit	Line	Data
252b5132	1	/* Disassemble z8000 code.
5c90f90d KH	2	Copyright 1992, 1993, 1995, 1998, 2000
5c90f90d KH	3	Free Software Foundation, Inc.
252b5132 RH	4
	5	This file is part of GNU Binutils.
	6
	7	This program 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 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	20
252b5132 RH	21	#include "sysdep.h"
	22	#include "dis-asm.h"
	23
	24	#define DEFINE_TABLE
	25	#include "z8k-opc.h"
252b5132 RH	26	\f
252b5132 RH	27	#include <setjmp.h>
252b5132 RH	28	\f
	29	typedef struct
	30	{
	31	/* These are all indexed by nibble number (i.e only every other entry
	32	of bytes is used, and every 4th entry of words). */
	33	unsigned char nibbles[24];
	34	unsigned char bytes[24];
	35	unsigned short words[24];
	36
	37	/* Nibble number of first word not yet fetched. */
	38	int max_fetched;
	39	bfd_vma insn_start;
	40	jmp_buf bailout;
	41
	42	long tabl_index;
	43	char instr_asmsrc[80];
	44	unsigned long arg_reg[0x0f];
	45	unsigned long immediate;
	46	unsigned long displacement;
	47	unsigned long address;
	48	unsigned long cond_code;
	49	unsigned long ctrl_code;
	50	unsigned long flags;
	51	unsigned long interrupts;
	52	}
	53	instr_data_s;
	54
	55	/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
	56	to ADDR (exclusive) are valid. Returns 1 for success, longjmps
	57	on error. */
	58	#define FETCH_DATA(info, nibble) \
	59	((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
	60	? 1 : fetch_data ((info), (nibble)))
	61
	62	static int
	63	fetch_data (info, nibble)
	64	struct disassemble_info *info;
	65	int nibble;
	66	{
	67	unsigned char mybuf[20];
	68	int status;
5c90f90d	69	instr_data_s priv = (instr_data_s ) info->private_data;
252b5132 RH	70
	71	if ((nibble % 4) != 0)
	72	abort ();
	73
	74	status = (*info->read_memory_func) (priv->insn_start,
	75	(bfd_byte *) mybuf,
	76	nibble / 2,
	77	info);
	78	if (status != 0)
	79	{
	80	(*info->memory_error_func) (status, priv->insn_start, info);
	81	longjmp (priv->bailout, 1);
	82	}
	83
	84	{
	85	int i;
5c90f90d KH	86	unsigned char *p = mybuf;
5c90f90d KH	87
252b5132 RH	88	for (i = 0; i < nibble;)
	89	{
	90	priv->words[i] = (p[0] << 8) \| p[1];
5c90f90d	91
252b5132 RH	92	priv->bytes[i] = *p;
252b5132 RH	93	priv->nibbles[i++] = *p >> 4;
5c90f90d	94	priv->nibbles[i++] = *p & 0xf;
252b5132 RH	95
	96	++p;
	97	priv->bytes[i] = *p;
	98	priv->nibbles[i++] = *p >> 4;
	99	priv->nibbles[i++] = *p & 0xf;
	100
	101	++p;
	102	}
	103	}
	104	priv->max_fetched = nibble;
	105	return 1;
	106	}
	107
	108	static char *codes[16] =
	109	{
	110	"f",
	111	"lt",
	112	"le",
	113	"ule",
	114	"ov/pe",
	115	"mi",
	116	"eq",
	117	"c/ult",
	118	"t",
	119	"ge",
	120	"gt",
	121	"ugt",
	122	"nov/po",
	123	"pl",
	124	"ne",
	125	"nc/uge"
	126	};
	127
5c90f90d	128	int z8k_lookup_instr PARAMS ((unsigned char , disassemble_info ));
252b5132 RH	129	static void output_instr
	130	PARAMS ((instr_data_s , unsigned long, disassemble_info ));
	131	static void unpack_instr PARAMS ((instr_data_s , int, disassemble_info ));
	132	static void unparse_instr PARAMS ((instr_data_s *));
	133
	134	static int
	135	print_insn_z8k (addr, info, is_segmented)
	136	bfd_vma addr;
	137	disassemble_info *info;
	138	int is_segmented;
	139	{
	140	instr_data_s instr_data;
	141
	142	info->private_data = (PTR) &instr_data;
	143	instr_data.max_fetched = 0;
	144	instr_data.insn_start = addr;
	145	if (setjmp (instr_data.bailout) != 0)
	146	/* Error return. */
	147	return -1;
	148
	149	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
	150	if (instr_data.tabl_index > 0)
	151	{
	152	unpack_instr (&instr_data, is_segmented, info);
	153	unparse_instr (&instr_data);
	154	output_instr (&instr_data, addr, info);
	155	return z8k_table[instr_data.tabl_index].length;
	156	}
	157	else
	158	{
	159	FETCH_DATA (info, 4);
	160	(*info->fprintf_func) (info->stream, ".word %02x%02x",
	161	instr_data.bytes[0], instr_data.bytes[2]);
	162	return 2;
	163	}
	164	}
	165
	166	int
	167	print_insn_z8001 (addr, info)
	168	bfd_vma addr;
	169	disassemble_info *info;
	170	{
	171	return print_insn_z8k (addr, info, 1);
	172	}
	173
	174	int
	175	print_insn_z8002 (addr, info)
	176	bfd_vma addr;
	177	disassemble_info *info;
	178	{
	179	return print_insn_z8k (addr, info, 0);
	180	}
	181
	182	int
	183	z8k_lookup_instr (nibbles, info)
	184	unsigned char *nibbles;
	185	disassemble_info *info;
	186	{
	187
	188	int nibl_index, tabl_index;
	189	int nibl_matched;
	190	unsigned short instr_nibl;
	191	unsigned short tabl_datum, datum_class, datum_value;
	192
193	nibl_matched = 0;
194	tabl_index = 0;
195	while (!nibl_matched && z8k_table[tabl_index].name)
196	{
197	nibl_matched = 1;
5c90f90d KH	198	for (nibl_index = 0;
	199	nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
	200	nibl_index++)
252b5132 RH	201	{
	202	if ((nibl_index % 4) == 0)
	203	/* Fetch one word at a time. */
	204	FETCH_DATA (info, nibl_index + 4);
	205	instr_nibl = nibbles[nibl_index];
	206
	207	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	208	datum_class = tabl_datum & CLASS_MASK;
	209	datum_value = ~CLASS_MASK & tabl_datum;
	210
	211	switch (datum_class)
	212	{
	213	case CLASS_BIT:
	214	if (datum_value != instr_nibl)
	215	nibl_matched = 0;
	216	break;
	217	case CLASS_00II:
	218	if (!((~instr_nibl) & 0x4))
	219	nibl_matched = 0;
	220	break;
	221	case CLASS_01II:
	222	if (!(instr_nibl & 0x4))
	223	nibl_matched = 0;
	224	break;
	225	case CLASS_0CCC:
	226	if (!((~instr_nibl) & 0x8))
	227	nibl_matched = 0;
	228	break;
	229	case CLASS_1CCC:
	230	if (!(instr_nibl & 0x8))
	231	nibl_matched = 0;
	232	break;
	233	case CLASS_0DISP7:
	234	if (!((~instr_nibl) & 0x8))
	235	nibl_matched = 0;
	236	nibl_index += 1;
	237	break;
	238	case CLASS_1DISP7:
	239	if (!(instr_nibl & 0x8))
	240	nibl_matched = 0;
	241	nibl_index += 1;
	242	break;
	243	case CLASS_REGN0:
	244	if (instr_nibl == 0)
	245	nibl_matched = 0;
	246	break;
	247	case CLASS_BIT_1OR2:
	248	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	249	nibl_matched = 0;
	250	break;
	251	default:
	252	break;
	253	}
	254	}
	255	if (nibl_matched)
	256	{
	257	return tabl_index;
	258	}
	259
	260	tabl_index++;
	261	}
	262	return -1;
	263
	264	}
265
266	static void
267	output_instr (instr_data, addr, info)
268	instr_data_s *instr_data;
269	unsigned long addr;
270	disassemble_info *info;
271	{
272	int loop, loop_limit;
273	char tmp_str[20];
274	char out_str[100];
275
276	strcpy (out_str, "\t");
277
278	loop_limit = z8k_table[instr_data->tabl_index].length * 2;
279	FETCH_DATA (info, loop_limit);
280	for (loop = 0; loop < loop_limit; loop++)
281	{
282	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
283	strcat (out_str, tmp_str);
284	}
285
286	while (loop++ < 8)
287	{
288	strcat (out_str, " ");
289	}
290
291	strcat (out_str, instr_data->instr_asmsrc);
292
293	(*info->fprintf_func) (info->stream, "%s", out_str);
294	}
295
296	static void
297	unpack_instr (instr_data, is_segmented, info)
298	instr_data_s *instr_data;
299	int is_segmented;
300	disassemble_info *info;
301	{
302	int nibl_count, loop;
303	unsigned short instr_nibl, instr_byte, instr_word;
304	long instr_long;
305	unsigned short tabl_datum, datum_class, datum_value;
306
307	nibl_count = 0;
308	loop = 0;
309	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
310	{
311	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
312	instr_nibl = instr_data->nibbles[nibl_count];
313	instr_byte = instr_data->bytes[nibl_count];
314	instr_word = instr_data->words[nibl_count];
315
316	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
317	datum_class = tabl_datum & CLASS_MASK;
318	datum_value = tabl_datum & ~CLASS_MASK;
319
320	switch (datum_class)
321	{
322	case CLASS_X:
323	instr_data->address = instr_nibl;
324	break;
325	case CLASS_BA:
326	instr_data->displacement = instr_nibl;
327	break;
328	case CLASS_BX:
329	instr_data->arg_reg[datum_value] = instr_nibl;
330	break;
331	case CLASS_DISP:
332	switch (datum_value)
333	{
334	case ARG_DISP16:
335	instr_data->displacement = instr_word;
336	nibl_count += 3;
337	break;
338	case ARG_DISP12:
339	instr_data->displacement = instr_word & 0x0fff;
340	nibl_count += 2;
341	break;
342	default:
343	break;
344	}
345	break;
346	case CLASS_IMM:
347	switch (datum_value)
348	{
349	case ARG_IMM4:
350	instr_data->immediate = instr_nibl;
351	break;
352	case ARG_NIM8:
353	instr_data->immediate = (-instr_byte);
354	nibl_count += 1;
355	break;
356	case ARG_IMM8:
357	instr_data->immediate = instr_byte;
358	nibl_count += 1;
359	break;
360	case ARG_IMM16:
361	instr_data->immediate = instr_word;
362	nibl_count += 3;
363	break;
364	case ARG_IMM32:
365	FETCH_DATA (info, nibl_count + 8);
366	instr_long = (instr_data->words[nibl_count] << 16)
367	\| (instr_data->words[nibl_count + 4]);
368	instr_data->immediate = instr_long;
369	nibl_count += 7;
370	break;
371	case ARG_IMMN:
372	instr_data->immediate = instr_nibl - 1;
373	break;
374	case ARG_IMM4M1:
375	instr_data->immediate = instr_nibl + 1;
376	break;
377	case ARG_IMM_1:
378	instr_data->immediate = 1;
379	break;
380	case ARG_IMM_2:
381	instr_data->immediate = 2;
382	break;
383	case ARG_IMM2:
384	instr_data->immediate = instr_nibl & 0x3;
385	break;
386	default:
387	break;
388	}
389	break;
390	case CLASS_CC:
391	instr_data->cond_code = instr_nibl;
392	break;
393	case CLASS_CTRL:
394	instr_data->ctrl_code = instr_nibl;
395	break;
396	case CLASS_DA:
397	case CLASS_ADDRESS:
398	if (is_segmented)
399	{
400	if (instr_nibl & 0x8)
401	{
402	FETCH_DATA (info, nibl_count + 8);
403	instr_long = (instr_data->words[nibl_count] << 16)
404	\| (instr_data->words[nibl_count + 4]);
405	instr_data->address = ((instr_word & 0x7f00) << 8) +
406	(instr_long & 0xffff);
407	nibl_count += 7;
408	}
409	else
410	{
411	instr_data->address = ((instr_word & 0x7f00) << 8) +
412	(instr_word & 0x00ff);
413	nibl_count += 3;
414	}
415	}
416	else
417	{
418	instr_data->address = instr_word;
419	nibl_count += 3;
420	}
421	break;
422	case CLASS_0CCC:
423	instr_data->cond_code = instr_nibl & 0x7;
424	break;
425	case CLASS_1CCC:
426	instr_data->cond_code = instr_nibl & 0x7;
427	break;
428	case CLASS_0DISP7:
429	instr_data->displacement = instr_byte & 0x7f;
430	nibl_count += 1;
431	break;
432	case CLASS_1DISP7:
433	instr_data->displacement = instr_byte & 0x7f;
434	nibl_count += 1;
435	break;
436	case CLASS_01II:
437	instr_data->interrupts = instr_nibl & 0x3;
438	break;
439	case CLASS_00II:
440	instr_data->interrupts = instr_nibl & 0x3;
441	break;
442	case CLASS_BIT:
5c90f90d	443	/* Do nothing. */
252b5132 RH	444	break;
	445	case CLASS_IR:
	446	instr_data->arg_reg[datum_value] = instr_nibl;
	447	break;
	448	case CLASS_FLAGS:
	449	instr_data->flags = instr_nibl;
	450	break;
	451	case CLASS_REG:
	452	instr_data->arg_reg[datum_value] = instr_nibl;
	453	break;
	454	case CLASS_REG_BYTE:
	455	instr_data->arg_reg[datum_value] = instr_nibl;
	456	break;
	457	case CLASS_REG_WORD:
	458	instr_data->arg_reg[datum_value] = instr_nibl;
	459	break;
	460	case CLASS_REG_QUAD:
	461	instr_data->arg_reg[datum_value] = instr_nibl;
	462	break;
	463	case CLASS_REG_LONG:
	464	instr_data->arg_reg[datum_value] = instr_nibl;
	465	break;
	466	case CLASS_REGN0:
	467	instr_data->arg_reg[datum_value] = instr_nibl;
	468	break;
	469	default:
	470	break;
	471	}
	472
	473	loop += 1;
	474	nibl_count += 1;
	475	}
	476	}
	477
	478	static void
	479	unparse_instr (instr_data)
	480	instr_data_s *instr_data;
	481	{
	482	unsigned short tabl_datum, datum_class, datum_value;
	483	int loop, loop_limit;
	484	char out_str[80], tmp_str[25];
	485
	486	sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
	487
	488	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	489	for (loop = 0; loop < loop_limit; loop++)
	490	{
	491	if (loop)
	492	strcat (out_str, ",");
	493
	494	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	495	datum_class = tabl_datum & CLASS_MASK;
	496	datum_value = tabl_datum & ~CLASS_MASK;
	497
	498	switch (datum_class)
	499	{
	500	case CLASS_X:
	501	sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
	502	instr_data->arg_reg[datum_value]);
	503	strcat (out_str, tmp_str);
	504	break;
	505	case CLASS_BA:
	506	sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
	507	instr_data->immediate);
508	strcat (out_str, tmp_str);
509	break;
510	case CLASS_BX:
511	sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
512	instr_data->arg_reg[ARG_RX]);
513	strcat (out_str, tmp_str);
514	break;
515	case CLASS_DISP:
516	sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
517	strcat (out_str, tmp_str);
518	break;
519	case CLASS_IMM:
520	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
521	strcat (out_str, tmp_str);
522	break;
523	case CLASS_CC:
524	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
525	strcat (out_str, tmp_str);
526	break;
527	case CLASS_CTRL:
528	sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
529	strcat (out_str, tmp_str);
530	break;
531	case CLASS_DA:
532	case CLASS_ADDRESS:
533	sprintf (tmp_str, "#0x%0lx", instr_data->address);
534	strcat (out_str, tmp_str);
535	break;
536	case CLASS_IR:
537	sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
538	strcat (out_str, tmp_str);
539	break;
540	case CLASS_FLAGS:
541	sprintf (tmp_str, "0x%0lx", instr_data->flags);
542	strcat (out_str, tmp_str);
543	break;
544	case CLASS_REG_BYTE:
545	if (instr_data->arg_reg[datum_value] >= 0x8)
546	{
547	sprintf (tmp_str, "rl%ld",
548	instr_data->arg_reg[datum_value] - 0x8);
549	}
550	else
551	{
552	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
553	}
554	strcat (out_str, tmp_str);
555	break;
556	case CLASS_REG_WORD:
557	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
558	strcat (out_str, tmp_str);
559	break;
560	case CLASS_REG_QUAD:
561	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
562	strcat (out_str, tmp_str);
563	break;
564	case CLASS_REG_LONG:
565	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
566	strcat (out_str, tmp_str);
567	break;
568	default:
569	break;
570	}
571	}
572
573	strcpy (instr_data->instr_asmsrc, out_str);
574	}