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

/* Disassemble z8000 code.
   Copyright 1992, 1993, 1998, 2000, 2001
   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"
};

static char *ctrl_names[8] = {
  "<invld>",
  "flags",
  "fcw",
  "refresh",
  "psapseg",
  "psapoff",
  "nspseg",
  "nspoff"
};

static int seg_length;
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 *, int));

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, is_segmented);
      output_instr (&instr_data, addr, info);
      return z8k_table[instr_data.tabl_index].length + seg_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 + seg_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 int tabl_datum, datum_class;
  unsigned short datum_value;

  nibl_count = 0;
  loop = 0;
  seg_length = 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 & ~1];
      instr_word = instr_data->words[nibl_count & ~3];

      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_DISP:
	  switch (datum_value)
	    {
	    case ARG_DISP16:
	      instr_data->displacement = instr_data->insn_start + 4
		+ (signed short) (instr_word & 0xffff);
	      nibl_count += 3;
	      break;
	    case ARG_DISP12:
	      if (instr_word & 0x800)
		{
		  /* neg. 12 bit displacement */
		  instr_data->displacement = instr_data->insn_start + 2
		    - (signed short) ((instr_word & 0xfff) | 0xf000) * 2;
		}
	      else
		{
		  instr_data->displacement = instr_data->insn_start + 2
		    - (instr_word & 0x0fff) * 2;
		}
	      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_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;
		  seg_length = 2;
		}
	      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:
	case CLASS_1CCC:
	  instr_data->ctrl_code = instr_nibl & 0x7;
	  break;
	case CLASS_0DISP7:
	  instr_data->displacement =
	    instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
	  nibl_count += 1;
	  break;
	case CLASS_1DISP7:
	  instr_data->displacement =
	    instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
	  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:
	  instr_data->ctrl_code = instr_nibl & 0x7;
	  break;
	case CLASS_FLAGS:
	  instr_data->flags = instr_nibl;
	  break;
	case CLASS_REG:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_REGN0:
	  instr_data->arg_reg[datum_value] = instr_nibl;
	  break;
	case CLASS_DISP8:
	  instr_data->displacement =
	    instr_data->insn_start + 2 + (signed char) instr_byte * 2;
	  nibl_count += 1;
	  break;
	default:
	  abort ();
	  break;
	}

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

static void
unparse_instr (instr_data, is_segmented)
     instr_data_s *instr_data;
     int is_segmented;
{
  unsigned short datum_value;
  unsigned int tabl_datum, datum_class;
  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, "%s", ctrl_names[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;
	case CLASS_PR:
	  if (is_segmented)
	    sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	  else
	    sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	default:
	  abort ();
	  break;
	}
    }

  strcpy (instr_data->instr_asmsrc, out_str);
}
Commit	Line	Data
252b5132	1	/* Disassemble z8000 code.
7f6621cd	2	Copyright 1992, 1993, 1998, 2000, 2001
5c90f90d	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	28	\f
ec22bdda	29	typedef struct {
252b5132 RH	30	/* These are all indexed by nibble number (i.e only every other entry
	31	of bytes is used, and every 4th entry of words). */
	32	unsigned char nibbles[24];
	33	unsigned char bytes[24];
	34	unsigned short words[24];
	35
	36	/* Nibble number of first word not yet fetched. */
	37	int max_fetched;
	38	bfd_vma insn_start;
	39	jmp_buf bailout;
	40
	41	long tabl_index;
	42	char instr_asmsrc[80];
	43	unsigned long arg_reg[0x0f];
	44	unsigned long immediate;
	45	unsigned long displacement;
	46	unsigned long address;
	47	unsigned long cond_code;
	48	unsigned long ctrl_code;
	49	unsigned long flags;
	50	unsigned long interrupts;
ec22bdda	51	} instr_data_s;
252b5132 RH	52
	53	/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
	54	to ADDR (exclusive) are valid. Returns 1 for success, longjmps
	55	on error. */
	56	#define FETCH_DATA(info, nibble) \
ec22bdda	57	((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
252b5132 RH	58	? 1 : fetch_data ((info), (nibble)))
	59
	60	static int
	61	fetch_data (info, nibble)
	62	struct disassemble_info *info;
	63	int nibble;
	64	{
	65	unsigned char mybuf[20];
	66	int status;
5c90f90d	67	instr_data_s priv = (instr_data_s ) info->private_data;
252b5132 RH	68
	69	if ((nibble % 4) != 0)
	70	abort ();
	71
	72	status = (*info->read_memory_func) (priv->insn_start,
	73	(bfd_byte *) mybuf,
	74	nibble / 2,
	75	info);
	76	if (status != 0)
	77	{
	78	(*info->memory_error_func) (status, priv->insn_start, info);
	79	longjmp (priv->bailout, 1);
	80	}
	81
	82	{
	83	int i;
5c90f90d KH	84	unsigned char *p = mybuf;
5c90f90d KH	85
252b5132 RH	86	for (i = 0; i < nibble;)
	87	{
	88	priv->words[i] = (p[0] << 8) \| p[1];
5c90f90d	89
252b5132 RH	90	priv->bytes[i] = *p;
252b5132 RH	91	priv->nibbles[i++] = *p >> 4;
5c90f90d	92	priv->nibbles[i++] = *p & 0xf;
252b5132 RH	93
	94	++p;
	95	priv->bytes[i] = *p;
	96	priv->nibbles[i++] = *p >> 4;
	97	priv->nibbles[i++] = *p & 0xf;
	98
	99	++p;
	100	}
	101	}
	102	priv->max_fetched = nibble;
	103	return 1;
	104	}
	105
ec22bdda	106	static char *codes[16] = {
252b5132 RH	107	"f",
	108	"lt",
	109	"le",
	110	"ule",
	111	"ov/pe",
	112	"mi",
	113	"eq",
	114	"c/ult",
	115	"t",
	116	"ge",
	117	"gt",
	118	"ugt",
	119	"nov/po",
	120	"pl",
	121	"ne",
	122	"nc/uge"
	123	};
	124
ec22bdda	125	static char *ctrl_names[8] = {
6840198f NC	126	"<invld>",
	127	"flags",
	128	"fcw",
	129	"refresh",
	130	"psapseg",
	131	"psapoff",
	132	"nspseg",
	133	"nspoff"
	134	};
	135
	136	static int seg_length;
5c90f90d	137	int z8k_lookup_instr PARAMS ((unsigned char , disassemble_info ));
252b5132 RH	138	static void output_instr
	139	PARAMS ((instr_data_s , unsigned long, disassemble_info ));
	140	static void unpack_instr PARAMS ((instr_data_s , int, disassemble_info ));
879db8be	141	static void unparse_instr PARAMS ((instr_data_s *, int));
252b5132 RH	142
	143	static int
	144	print_insn_z8k (addr, info, is_segmented)
	145	bfd_vma addr;
	146	disassemble_info *info;
	147	int is_segmented;
	148	{
	149	instr_data_s instr_data;
	150
	151	info->private_data = (PTR) &instr_data;
	152	instr_data.max_fetched = 0;
	153	instr_data.insn_start = addr;
	154	if (setjmp (instr_data.bailout) != 0)
	155	/* Error return. */
	156	return -1;
	157
	158	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
	159	if (instr_data.tabl_index > 0)
	160	{
	161	unpack_instr (&instr_data, is_segmented, info);
6840198f	162	unparse_instr (&instr_data, is_segmented);
252b5132	163	output_instr (&instr_data, addr, info);
6840198f	164	return z8k_table[instr_data.tabl_index].length + seg_length;
252b5132 RH	165	}
	166	else
	167	{
	168	FETCH_DATA (info, 4);
	169	(*info->fprintf_func) (info->stream, ".word %02x%02x",
	170	instr_data.bytes[0], instr_data.bytes[2]);
	171	return 2;
	172	}
	173	}
	174
	175	int
	176	print_insn_z8001 (addr, info)
	177	bfd_vma addr;
	178	disassemble_info *info;
	179	{
	180	return print_insn_z8k (addr, info, 1);
	181	}
	182
	183	int
	184	print_insn_z8002 (addr, info)
	185	bfd_vma addr;
	186	disassemble_info *info;
	187	{
	188	return print_insn_z8k (addr, info, 0);
	189	}
	190
	191	int
	192	z8k_lookup_instr (nibbles, info)
	193	unsigned char *nibbles;
	194	disassemble_info *info;
	195	{
	196
	197	int nibl_index, tabl_index;
	198	int nibl_matched;
	199	unsigned short instr_nibl;
	200	unsigned short tabl_datum, datum_class, datum_value;
	201
	202	nibl_matched = 0;
	203	tabl_index = 0;
	204	while (!nibl_matched && z8k_table[tabl_index].name)
	205	{
	206	nibl_matched = 1;
5c90f90d KH	207	for (nibl_index = 0;
	208	nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
	209	nibl_index++)
252b5132 RH	210	{
	211	if ((nibl_index % 4) == 0)
	212	/* Fetch one word at a time. */
	213	FETCH_DATA (info, nibl_index + 4);
	214	instr_nibl = nibbles[nibl_index];
	215
	216	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	217	datum_class = tabl_datum & CLASS_MASK;
	218	datum_value = ~CLASS_MASK & tabl_datum;
	219
	220	switch (datum_class)
	221	{
	222	case CLASS_BIT:
	223	if (datum_value != instr_nibl)
	224	nibl_matched = 0;
	225	break;
	226	case CLASS_00II:
	227	if (!((~instr_nibl) & 0x4))
	228	nibl_matched = 0;
	229	break;
	230	case CLASS_01II:
	231	if (!(instr_nibl & 0x4))
	232	nibl_matched = 0;
	233	break;
	234	case CLASS_0CCC:
	235	if (!((~instr_nibl) & 0x8))
	236	nibl_matched = 0;
	237	break;
	238	case CLASS_1CCC:
	239	if (!(instr_nibl & 0x8))
	240	nibl_matched = 0;
	241	break;
	242	case CLASS_0DISP7:
	243	if (!((~instr_nibl) & 0x8))
	244	nibl_matched = 0;
	245	nibl_index += 1;
	246	break;
	247	case CLASS_1DISP7:
	248	if (!(instr_nibl & 0x8))
	249	nibl_matched = 0;
	250	nibl_index += 1;
	251	break;
	252	case CLASS_REGN0:
	253	if (instr_nibl == 0)
	254	nibl_matched = 0;
	255	break;
	256	case CLASS_BIT_1OR2:
	257	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	258	nibl_matched = 0;
	259	break;
	260	default:
	261	break;
	262	}
	263	}
	264	if (nibl_matched)
	265	{
	266	return tabl_index;
	267	}
	268
	269	tabl_index++;
	270	}
	271	return -1;
252b5132 RH	272	}
	273
	274	static void
	275	output_instr (instr_data, addr, info)
	276	instr_data_s *instr_data;
	277	unsigned long addr;
	278	disassemble_info *info;
	279	{
	280	int loop, loop_limit;
	281	char tmp_str[20];
	282	char out_str[100];
	283
	284	strcpy (out_str, "\t");
	285
6840198f	286	loop_limit = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
252b5132 RH	287	FETCH_DATA (info, loop_limit);
	288	for (loop = 0; loop < loop_limit; loop++)
	289	{
	290	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
	291	strcat (out_str, tmp_str);
	292	}
	293
	294	while (loop++ < 8)
	295	{
	296	strcat (out_str, " ");
	297	}
	298
	299	strcat (out_str, instr_data->instr_asmsrc);
	300
	301	(*info->fprintf_func) (info->stream, "%s", out_str);
	302	}
	303
	304	static void
	305	unpack_instr (instr_data, is_segmented, info)
	306	instr_data_s *instr_data;
	307	int is_segmented;
	308	disassemble_info *info;
	309	{
	310	int nibl_count, loop;
	311	unsigned short instr_nibl, instr_byte, instr_word;
	312	long instr_long;
6840198f NC	313	unsigned int tabl_datum, datum_class;
6840198f NC	314	unsigned short datum_value;
252b5132 RH	315
	316	nibl_count = 0;
	317	loop = 0;
6840198f	318	seg_length = 0;
252b5132 RH	319	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	320	{
	321	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	322	instr_nibl = instr_data->nibbles[nibl_count];
ec22bdda KH	323	instr_byte = instr_data->bytes[nibl_count & ~1];
ec22bdda KH	324	instr_word = instr_data->words[nibl_count & ~3];
252b5132 RH	325
	326	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	327	datum_class = tabl_datum & CLASS_MASK;
	328	datum_value = tabl_datum & ~CLASS_MASK;
	329
	330	switch (datum_class)
	331	{
252b5132 RH	332	case CLASS_DISP:
	333	switch (datum_value)
	334	{
	335	case ARG_DISP16:
7f6621cd KH	336	instr_data->displacement = instr_data->insn_start + 4
7f6621cd KH	337	+ (signed short) (instr_word & 0xffff);
252b5132 RH	338	nibl_count += 3;
	339	break;
	340	case ARG_DISP12:
7f6621cd	341	if (instr_word & 0x800)
ec22bdda KH	342	{
	343	/* neg. 12 bit displacement */
	344	instr_data->displacement = instr_data->insn_start + 2
	345	- (signed short) ((instr_word & 0xfff) \| 0xf000) * 2;
	346	}
7f6621cd	347	else
ec22bdda KH	348	{
	349	instr_data->displacement = instr_data->insn_start + 2
	350	- (instr_word & 0x0fff) * 2;
7f6621cd	351	}
252b5132 RH	352	nibl_count += 2;
	353	break;
	354	default:
	355	break;
	356	}
	357	break;
	358	case CLASS_IMM:
	359	switch (datum_value)
	360	{
	361	case ARG_IMM4:
	362	instr_data->immediate = instr_nibl;
	363	break;
	364	case ARG_NIM8:
	365	instr_data->immediate = (-instr_byte);
	366	nibl_count += 1;
	367	break;
	368	case ARG_IMM8:
	369	instr_data->immediate = instr_byte;
	370	nibl_count += 1;
	371	break;
	372	case ARG_IMM16:
	373	instr_data->immediate = instr_word;
	374	nibl_count += 3;
	375	break;
	376	case ARG_IMM32:
	377	FETCH_DATA (info, nibl_count + 8);
	378	instr_long = (instr_data->words[nibl_count] << 16)
	379	\| (instr_data->words[nibl_count + 4]);
	380	instr_data->immediate = instr_long;
	381	nibl_count += 7;
	382	break;
	383	case ARG_IMMN:
	384	instr_data->immediate = instr_nibl - 1;
	385	break;
	386	case ARG_IMM4M1:
	387	instr_data->immediate = instr_nibl + 1;
	388	break;
	389	case ARG_IMM_1:
	390	instr_data->immediate = 1;
	391	break;
	392	case ARG_IMM_2:
	393	instr_data->immediate = 2;
	394	break;
	395	case ARG_IMM2:
	396	instr_data->immediate = instr_nibl & 0x3;
	397	break;
	398	default:
	399	break;
	400	}
	401	break;
	402	case CLASS_CC:
	403	instr_data->cond_code = instr_nibl;
	404	break;
252b5132 RH	405	case CLASS_ADDRESS:
	406	if (is_segmented)
	407	{
	408	if (instr_nibl & 0x8)
	409	{
	410	FETCH_DATA (info, nibl_count + 8);
	411	instr_long = (instr_data->words[nibl_count] << 16)
	412	\| (instr_data->words[nibl_count + 4]);
7f6621cd KH	413	instr_data->address = ((instr_word & 0x7f00) << 8)
7f6621cd KH	414	+ (instr_long & 0xffff);
252b5132	415	nibl_count += 7;
7f6621cd	416	seg_length = 2;
252b5132 RH	417	}
	418	else
	419	{
7f6621cd KH	420	instr_data->address = ((instr_word & 0x7f00) << 8)
7f6621cd KH	421	+ (instr_word & 0x00ff);
252b5132 RH	422	nibl_count += 3;
	423	}
	424	}
	425	else
	426	{
	427	instr_data->address = instr_word;
	428	nibl_count += 3;
	429	}
	430	break;
	431	case CLASS_0CCC:
252b5132	432	case CLASS_1CCC:
6840198f	433	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132 RH	434	break;
252b5132 RH	435	case CLASS_0DISP7:
7f6621cd KH	436	instr_data->displacement =
7f6621cd KH	437	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	438	nibl_count += 1;
	439	break;
	440	case CLASS_1DISP7:
7f6621cd KH	441	instr_data->displacement =
7f6621cd KH	442	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	443	nibl_count += 1;
	444	break;
	445	case CLASS_01II:
	446	instr_data->interrupts = instr_nibl & 0x3;
	447	break;
	448	case CLASS_00II:
	449	instr_data->interrupts = instr_nibl & 0x3;
	450	break;
	451	case CLASS_BIT:
6840198f	452	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132	453	break;
252b5132 RH	454	case CLASS_FLAGS:
	455	instr_data->flags = instr_nibl;
	456	break;
	457	case CLASS_REG:
	458	instr_data->arg_reg[datum_value] = instr_nibl;
	459	break;
252b5132 RH	460	case CLASS_REGN0:
	461	instr_data->arg_reg[datum_value] = instr_nibl;
	462	break;
7f6621cd KH	463	case CLASS_DISP8:
	464	instr_data->displacement =
	465	instr_data->insn_start + 2 + (signed char) instr_byte * 2;
6840198f	466	nibl_count += 1;
7f6621cd	467	break;
252b5132	468	default:
7f6621cd	469	abort ();
252b5132 RH	470	break;
	471	}
	472
	473	loop += 1;
	474	nibl_count += 1;
	475	}
	476	}
	477
	478	static void
ec22bdda	479	unparse_instr (instr_data, is_segmented)
252b5132	480	instr_data_s *instr_data;
6840198f	481	int is_segmented;
252b5132	482	{
6840198f NC	483	unsigned short datum_value;
6840198f NC	484	unsigned int tabl_datum, datum_class;
252b5132 RH	485	int loop, loop_limit;
	486	char out_str[80], tmp_str[25];
	487
	488	sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
	489
	490	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	491	for (loop = 0; loop < loop_limit; loop++)
	492	{
	493	if (loop)
	494	strcat (out_str, ",");
	495
	496	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	497	datum_class = tabl_datum & CLASS_MASK;
	498	datum_value = tabl_datum & ~CLASS_MASK;
	499
	500	switch (datum_class)
	501	{
	502	case CLASS_X:
	503	sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
	504	instr_data->arg_reg[datum_value]);
	505	strcat (out_str, tmp_str);
	506	break;
	507	case CLASS_BA:
	508	sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
	509	instr_data->immediate);
	510	strcat (out_str, tmp_str);
	511	break;
	512	case CLASS_BX:
	513	sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
	514	instr_data->arg_reg[ARG_RX]);
	515	strcat (out_str, tmp_str);
	516	break;
	517	case CLASS_DISP:
6840198f	518	sprintf (tmp_str, "0x%0lx", instr_data->displacement);
252b5132 RH	519	strcat (out_str, tmp_str);
	520	break;
	521	case CLASS_IMM:
	522	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
	523	strcat (out_str, tmp_str);
	524	break;
	525	case CLASS_CC:
	526	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	527	strcat (out_str, tmp_str);
	528	break;
	529	case CLASS_CTRL:
6840198f	530	sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
252b5132 RH	531	strcat (out_str, tmp_str);
	532	break;
	533	case CLASS_DA:
	534	case CLASS_ADDRESS:
6840198f	535	sprintf (tmp_str, "0x%0lx", instr_data->address);
252b5132 RH	536	strcat (out_str, tmp_str);
	537	break;
	538	case CLASS_IR:
	539	sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
	540	strcat (out_str, tmp_str);
	541	break;
	542	case CLASS_FLAGS:
	543	sprintf (tmp_str, "0x%0lx", instr_data->flags);
	544	strcat (out_str, tmp_str);
	545	break;
	546	case CLASS_REG_BYTE:
	547	if (instr_data->arg_reg[datum_value] >= 0x8)
	548	{
	549	sprintf (tmp_str, "rl%ld",
	550	instr_data->arg_reg[datum_value] - 0x8);
	551	}
	552	else
	553	{
	554	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
	555	}
	556	strcat (out_str, tmp_str);
	557	break;
	558	case CLASS_REG_WORD:
	559	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	560	strcat (out_str, tmp_str);
	561	break;
	562	case CLASS_REG_QUAD:
	563	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
	564	strcat (out_str, tmp_str);
	565	break;
	566	case CLASS_REG_LONG:
	567	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	568	strcat (out_str, tmp_str);
	569	break;
6840198f	570	case CLASS_PR:
7f6621cd KH	571	if (is_segmented)
	572	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	573	else
	574	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
6840198f NC	575	strcat (out_str, tmp_str);
6840198f NC	576	break;
252b5132	577	default:
7f6621cd	578	abort ();
252b5132 RH	579	break;
	580	}
	581	}
	582
	583	strcpy (instr_data->instr_asmsrc, out_str);
	584	}