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

/*
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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <ansidecl.h>
#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;
  bfd_vma start = priv->insn_start + priv->max_fetched / 2;

  if ((nibble % 4) != 0)
    abort ();
  status = (*info->read_memory_func) (start,
				      (bfd_byte *) mybuf,
				      (nibble - priv->max_fetched) / 2,
				      info);
  if (status != 0)
    {
      (*info->memory_error_func) (status, start, info);
      longjmp (priv->bailout, 1);
    }

  {
    int i;
    char *p = mybuf + priv->max_fetched / 2;
    
    for (i = priv->max_fetched; 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)
     unsigned long 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;
    }
}

print_insn_z8001 (addr, info)
     unsigned long addr;
     disassemble_info *info;
{
  return print_insn_z8k (addr, info, 1);
}

print_insn_z8002 (addr, info)
     unsigned long 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;
	      /* ????? */
	      /* missing ARG_IMMNMINUS1 */
	    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%0x(R%d)", instr_data->address,
		   instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_BA:
	  sprintf (tmp_str, "r%d(#%x)", instr_data->arg_reg[datum_value],
		   instr_data->immediate);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_BX:
	  sprintf (tmp_str, "r%d(R%d)", 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%0x", instr_data->displacement);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_IMM:
	  sprintf (tmp_str, "#0x%0x", 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%0x", instr_data->ctrl_code);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_DA:
	case CLASS_ADDRESS:
	  sprintf (tmp_str, "#0x%0x", instr_data->address);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_IR:
	  sprintf (tmp_str, "@R%d", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_FLAGS:
	  sprintf (tmp_str, "0x%0x", 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%d",
		       instr_data->arg_reg[datum_value] - 0x8);
	    }
	  else
	    {
	      sprintf (tmp_str, "rh%d", instr_data->arg_reg[datum_value]);
	    }
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_WORD:
	  sprintf (tmp_str, "r%d", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_QUAD:
	  sprintf (tmp_str, "rq%d", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_REG_LONG:
	  sprintf (tmp_str, "rr%d", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	default:
	  break;
	}
    }

  strcpy (instr_data->instr_asmsrc, out_str);
}
Commit	Line	Data
5d0734a7 JK	1	/*
	2	This file is part of GNU Binutils.
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
	16	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	17
	18	#include <ansidecl.h>
	19	#include "sysdep.h"
	20	#include "dis-asm.h"
	21
c38f5470 SC	22	#define DEFINE_TABLE
	23	#include "z8k-opc.h"
	24
5d0734a7 JK	25	\f
	26	#include <setjmp.h>
	27
	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	{
b7b184a1	67	unsigned char mybuf[20];
5d0734a7 JK	68	int status;
	69	instr_data_s priv = (instr_data_s )info->private_data;
	70	bfd_vma start = priv->insn_start + priv->max_fetched / 2;
	71
	72	if ((nibble % 4) != 0)
	73	abort ();
	74	status = (*info->read_memory_func) (start,
b7b184a1	75	(bfd_byte *) mybuf,
5d0734a7 JK	76	(nibble - priv->max_fetched) / 2,
	77	info);
	78	if (status != 0)
	79	{
	80	(*info->memory_error_func) (status, start, info);
b7b184a1	81	longjmp (priv->bailout, 1);
5d0734a7 JK	82	}
	83
	84	{
	85	int i;
	86	char *p = mybuf + priv->max_fetched / 2;
	87
	88	for (i = priv->max_fetched; i < nibble;)
	89	{
	90	priv->words[i] = (p[0] << 8) \| p[1];
	91
	92	priv->bytes[i] = *p;
	93	priv->nibbles[i++] = *p >> 4;
	94	priv->nibbles[i++] = *p &0xf;
	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] =
c38f5470 SC	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
5d0734a7 JK	128	int z8k_lookup_instr PARAMS ((unsigned char, disassemble_info ));
	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	unsigned long addr;
	137	disassemble_info *info;
	138	int is_segmented;
c38f5470	139	{
5d0734a7	140	instr_data_s instr_data;
c38f5470	141
5d0734a7 JK	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;
c38f5470	148
5d0734a7 JK	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	}
c38f5470 SC	164	}
c38f5470 SC	165
5d0734a7 JK	166	print_insn_z8001 (addr, info)
	167	unsigned long addr;
	168	disassemble_info *info;
c38f5470	169	{
5d0734a7	170	return print_insn_z8k (addr, info, 1);
c38f5470 SC	171	}
c38f5470 SC	172
5d0734a7 JK	173	print_insn_z8002 (addr, info)
	174	unsigned long addr;
	175	disassemble_info *info;
c38f5470	176	{
5d0734a7	177	return print_insn_z8k (addr, info, 0);
c38f5470 SC	178	}
c38f5470 SC	179
5d0734a7 JK	180	int
	181	z8k_lookup_instr (nibbles, info)
	182	unsigned char *nibbles;
	183	disassemble_info *info;
c38f5470 SC	184	{
c38f5470 SC	185
5d0734a7 JK	186	int nibl_index, tabl_index;
5d0734a7 JK	187	int nibl_matched;
c38f5470 SC	188	unsigned short instr_nibl;
	189	unsigned short tabl_datum, datum_class, datum_value;
	190
	191	nibl_matched = 0;
	192	tabl_index = 0;
5d0734a7	193	while (!nibl_matched && z8k_table[tabl_index].name)
c38f5470	194	{
5d0734a7 JK	195	nibl_matched = 1;
	196	for (nibl_index = 0; nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched; nibl_index++)
	197	{
	198	if ((nibl_index % 4) == 0)
	199	/* Fetch one word at a time. */
	200	FETCH_DATA (info, nibl_index + 4);
	201	instr_nibl = nibbles[nibl_index];
	202
	203	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	204	datum_class = tabl_datum & CLASS_MASK;
	205	datum_value = ~CLASS_MASK & tabl_datum;
	206
	207	switch (datum_class)
	208	{
	209	case CLASS_BIT:
	210	if (datum_value != instr_nibl)
	211	nibl_matched = 0;
	212	break;
	213	case CLASS_00II:
	214	if (!((~instr_nibl) & 0x4))
	215	nibl_matched = 0;
	216	break;
	217	case CLASS_01II:
	218	if (!(instr_nibl & 0x4))
	219	nibl_matched = 0;
	220	break;
	221	case CLASS_0CCC:
	222	if (!((~instr_nibl) & 0x8))
	223	nibl_matched = 0;
	224	break;
	225	case CLASS_1CCC:
	226	if (!(instr_nibl & 0x8))
	227	nibl_matched = 0;
	228	break;
	229	case CLASS_0DISP7:
	230	if (!((~instr_nibl) & 0x8))
	231	nibl_matched = 0;
	232	nibl_index += 1;
	233	break;
	234	case CLASS_1DISP7:
	235	if (!(instr_nibl & 0x8))
	236	nibl_matched = 0;
	237	nibl_index += 1;
	238	break;
	239	case CLASS_REGN0:
	240	if (instr_nibl == 0)
	241	nibl_matched = 0;
	242	break;
	243	case CLASS_BIT_1OR2:
	244	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	245	nibl_matched = 0;
	246	break;
	247	default:
	248	break;
	249	}
	250	}
	251	if (nibl_matched)
	252	{
	253	return tabl_index;
	254	}
	255
	256	tabl_index++;
c38f5470	257	}
5d0734a7	258	return -1;
c38f5470 SC	259
	260	}
	261
5d0734a7 JK	262	static void
	263	output_instr (instr_data, addr, info)
	264	instr_data_s *instr_data;
	265	unsigned long addr;
	266	disassemble_info *info;
c38f5470	267	{
5d0734a7 JK	268	int loop, loop_limit;
	269	char tmp_str[20];
	270	char out_str[100];
c38f5470	271
5d0734a7	272	strcpy (out_str, "\t");
c38f5470	273
5d0734a7 JK	274	loop_limit = z8k_table[instr_data->tabl_index].length * 2;
	275	FETCH_DATA (info, loop_limit);
	276	for (loop = 0; loop < loop_limit; loop++)
	277	{
	278	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
	279	strcat (out_str, tmp_str);
	280	}
c38f5470	281
5d0734a7 JK	282	while (loop++ < 8)
	283	{
	284	strcat (out_str, " ");
	285	}
c38f5470	286
5d0734a7	287	strcat (out_str, instr_data->instr_asmsrc);
c38f5470	288
5d0734a7	289	(*info->fprintf_func) (info->stream, "%s", out_str);
c38f5470 SC	290	}
c38f5470 SC	291
5d0734a7 JK	292	static void
	293	unpack_instr (instr_data, is_segmented, info)
	294	instr_data_s *instr_data;
	295	int is_segmented;
	296	disassemble_info *info;
c38f5470	297	{
5d0734a7 JK	298	int nibl_count, loop;
	299	unsigned short instr_nibl, instr_byte, instr_word;
	300	long instr_long;
	301	unsigned short tabl_datum, datum_class, datum_value;
	302
	303	nibl_count = 0;
	304	loop = 0;
	305	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	306	{
	307	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	308	instr_nibl = instr_data->nibbles[nibl_count];
	309	instr_byte = instr_data->bytes[nibl_count];
	310	instr_word = instr_data->words[nibl_count];
c38f5470 SC	311
	312	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	313	datum_class = tabl_datum & CLASS_MASK;
	314	datum_value = tabl_datum & ~CLASS_MASK;
	315
5d0734a7 JK	316	switch (datum_class)
	317	{
	318	case CLASS_X:
	319	instr_data->address = instr_nibl;
	320	break;
	321	case CLASS_BA:
	322	instr_data->displacement = instr_nibl;
	323	break;
	324	case CLASS_BX:
	325	instr_data->arg_reg[datum_value] = instr_nibl;
	326	break;
	327	case CLASS_DISP:
	328	switch (datum_value)
	329	{
	330	case ARG_DISP16:
	331	instr_data->displacement = instr_word;
	332	nibl_count += 3;
	333	break;
	334	case ARG_DISP12:
	335	instr_data->displacement = instr_word & 0x0fff;
	336	nibl_count += 2;
	337	break;
	338	default:
	339	break;
	340	}
	341	break;
	342	case CLASS_IMM:
	343	switch (datum_value)
	344	{
	345	case ARG_IMM4:
	346	instr_data->immediate = instr_nibl;
	347	break;
	348	case ARG_NIM8:
	349	instr_data->immediate = (-instr_byte);
	350	nibl_count += 1;
	351	break;
	352	case ARG_IMM8:
	353	instr_data->immediate = instr_byte;
	354	nibl_count += 1;
	355	break;
	356	case ARG_IMM16:
	357	instr_data->immediate = instr_word;
	358	nibl_count += 3;
	359	break;
	360	case ARG_IMM32:
	361	FETCH_DATA (info, nibl_count + 8);
	362	instr_long = (instr_data->words[nibl_count] << 16)
	363	\| (instr_data->words[nibl_count + 4]);
	364	instr_data->immediate = instr_long;
	365	nibl_count += 7;
	366	break;
	367	case ARG_IMMN:
	368	instr_data->immediate = instr_nibl - 1;
	369	break;
	370	/* ????? */
	371	/* missing ARG_IMMNMINUS1 */
	372	case ARG_IMM_1:
	373	instr_data->immediate = 1;
	374	break;
	375	case ARG_IMM_2:
	376	instr_data->immediate = 2;
	377	break;
	378	case ARG_IMM2:
	379	instr_data->immediate = instr_nibl & 0x3;
380	break;
381	default:
382	break;
383	}
384	break;
385	case CLASS_CC:
386	instr_data->cond_code = instr_nibl;
387	break;
388	case CLASS_CTRL:
389	instr_data->ctrl_code = instr_nibl;
390	break;
391	case CLASS_DA:
392	case CLASS_ADDRESS:
393	if (is_segmented)
394	{
395	if (instr_nibl & 0x8)
396	{
397	FETCH_DATA (info, nibl_count + 8);
398	instr_long = (instr_data->words[nibl_count] << 16)
399	\| (instr_data->words[nibl_count + 4]);
400	instr_data->address = ((instr_word & 0x7f00) << 8) +
401	(instr_long & 0xffff);
402	nibl_count += 7;
403	}
404	else
405	{
406	instr_data->address = ((instr_word & 0x7f00) << 8) +
407	(instr_word & 0x00ff);
408	nibl_count += 3;
409	}
410	}
411	else
412	{
413	instr_data->address = instr_word;
414	nibl_count += 3;
415	}
416	break;
417	case CLASS_0CCC:
418	instr_data->cond_code = instr_nibl & 0x7;
419	break;
420	case CLASS_1CCC:
421	instr_data->cond_code = instr_nibl & 0x7;
422	break;
423	case CLASS_0DISP7:
424	instr_data->displacement = instr_byte & 0x7f;
425	nibl_count += 1;
426	break;
427	case CLASS_1DISP7:
428	instr_data->displacement = instr_byte & 0x7f;
429	nibl_count += 1;
430	break;
431	case CLASS_01II:
432	instr_data->interrupts = instr_nibl & 0x3;
433	break;
434	case CLASS_00II:
435	instr_data->interrupts = instr_nibl & 0x3;
436	break;
437	case CLASS_BIT:
438	/* do nothing */
439	break;
440	case CLASS_IR:
441	instr_data->arg_reg[datum_value] = instr_nibl;
442	break;
443	case CLASS_FLAGS:
444	instr_data->flags = instr_nibl;
445	break;
446	case CLASS_REG:
447	instr_data->arg_reg[datum_value] = instr_nibl;
448	break;
449	case CLASS_REG_BYTE:
450	instr_data->arg_reg[datum_value] = instr_nibl;
451	break;
452	case CLASS_REG_WORD:
453	instr_data->arg_reg[datum_value] = instr_nibl;
454	break;
455	case CLASS_REG_QUAD:
456	instr_data->arg_reg[datum_value] = instr_nibl;
457	break;
458	case CLASS_REG_LONG:
459	instr_data->arg_reg[datum_value] = instr_nibl;
460	break;
461	case CLASS_REGN0:
462	instr_data->arg_reg[datum_value] = instr_nibl;
463	break;
464	default:
465	break;
466	}
c38f5470 SC	467
	468	loop += 1;
	469	nibl_count += 1;
5d0734a7	470	}
c38f5470 SC	471	}
c38f5470 SC	472
5d0734a7 JK	473	static void
	474	unparse_instr (instr_data)
	475	instr_data_s *instr_data;
c38f5470	476	{
5d0734a7 JK	477	unsigned short tabl_datum, datum_class, datum_value;
	478	int loop, loop_limit;
	479	char out_str[80], tmp_str[25];
c38f5470	480
5d0734a7	481	sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
c38f5470	482
5d0734a7 JK	483	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	484	for (loop = 0; loop < loop_limit; loop++)
	485	{
	486	if (loop)
	487	strcat (out_str, ",");
c38f5470 SC	488
	489	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	490	datum_class = tabl_datum & CLASS_MASK;
	491	datum_value = tabl_datum & ~CLASS_MASK;
	492
5d0734a7 JK	493	switch (datum_class)
	494	{
	495	case CLASS_X:
	496	sprintf (tmp_str, "0x%0x(R%d)", instr_data->address,
	497	instr_data->arg_reg[datum_value]);
	498	strcat (out_str, tmp_str);
	499	break;
	500	case CLASS_BA:
	501	sprintf (tmp_str, "r%d(#%x)", instr_data->arg_reg[datum_value],
	502	instr_data->immediate);
	503	strcat (out_str, tmp_str);
	504	break;
	505	case CLASS_BX:
	506	sprintf (tmp_str, "r%d(R%d)", instr_data->arg_reg[datum_value],
	507	instr_data->arg_reg[ARG_RX]);
	508	strcat (out_str, tmp_str);
	509	break;
	510	case CLASS_DISP:
	511	sprintf (tmp_str, "#0x%0x", instr_data->displacement);
	512	strcat (out_str, tmp_str);
	513	break;
	514	case CLASS_IMM:
	515	sprintf (tmp_str, "#0x%0x", instr_data->immediate);
	516	strcat (out_str, tmp_str);
	517	break;
	518	case CLASS_CC:
	519	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	520	strcat (out_str, tmp_str);
	521	break;
	522	case CLASS_CTRL:
	523	sprintf (tmp_str, "0x%0x", instr_data->ctrl_code);
	524	strcat (out_str, tmp_str);
	525	break;
	526	case CLASS_DA:
	527	case CLASS_ADDRESS:
	528	sprintf (tmp_str, "#0x%0x", instr_data->address);
	529	strcat (out_str, tmp_str);
	530	break;
	531	case CLASS_IR:
	532	sprintf (tmp_str, "@R%d", instr_data->arg_reg[datum_value]);
	533	strcat (out_str, tmp_str);
	534	break;
	535	case CLASS_FLAGS:
	536	sprintf (tmp_str, "0x%0x", instr_data->flags);
	537	strcat (out_str, tmp_str);
	538	break;
	539	case CLASS_REG_BYTE:
	540	if (instr_data->arg_reg[datum_value] >= 0x8)
	541	{
	542	sprintf (tmp_str, "rl%d",
	543	instr_data->arg_reg[datum_value] - 0x8);
	544	}
	545	else
	546	{
	547	sprintf (tmp_str, "rh%d", instr_data->arg_reg[datum_value]);
	548	}
	549	strcat (out_str, tmp_str);
	550	break;
	551	case CLASS_REG_WORD:
	552	sprintf (tmp_str, "r%d", instr_data->arg_reg[datum_value]);
	553	strcat (out_str, tmp_str);
	554	break;
	555	case CLASS_REG_QUAD:
	556	sprintf (tmp_str, "rq%d", instr_data->arg_reg[datum_value]);
557	strcat (out_str, tmp_str);
558	break;
559	case CLASS_REG_LONG:
560	sprintf (tmp_str, "rr%d", instr_data->arg_reg[datum_value]);
561	strcat (out_str, tmp_str);
562	break;
563	default:
564	break;
565	}
566	}
c38f5470	567
5d0734a7	568	strcpy (instr_data->instr_asmsrc, out_str);
c38f5470	569	}