[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;

static int fetch_data PARAMS ((struct disassemble_info *, int));


/* 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;
static int print_insn_z8k PARAMS ((bfd_vma, disassemble_info *, int));
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 ATTRIBUTE_UNUSED;
     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:
	  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;
	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	52
d83c6548 AJ	53	static int fetch_data PARAMS ((struct disassemble_info *, int));
	54
	55
252b5132 RH	56	/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
	57	to ADDR (exclusive) are valid. Returns 1 for success, longjmps
	58	on error. */
	59	#define FETCH_DATA(info, nibble) \
ec22bdda	60	((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
252b5132 RH	61	? 1 : fetch_data ((info), (nibble)))
	62
	63	static int
	64	fetch_data (info, nibble)
	65	struct disassemble_info *info;
	66	int nibble;
	67	{
	68	unsigned char mybuf[20];
	69	int status;
5c90f90d	70	instr_data_s priv = (instr_data_s ) info->private_data;
252b5132 RH	71
	72	if ((nibble % 4) != 0)
	73	abort ();
	74
	75	status = (*info->read_memory_func) (priv->insn_start,
	76	(bfd_byte *) mybuf,
	77	nibble / 2,
	78	info);
	79	if (status != 0)
	80	{
	81	(*info->memory_error_func) (status, priv->insn_start, info);
	82	longjmp (priv->bailout, 1);
	83	}
	84
	85	{
	86	int i;
5c90f90d KH	87	unsigned char *p = mybuf;
5c90f90d KH	88
252b5132 RH	89	for (i = 0; i < nibble;)
	90	{
	91	priv->words[i] = (p[0] << 8) \| p[1];
5c90f90d	92
252b5132 RH	93	priv->bytes[i] = *p;
252b5132 RH	94	priv->nibbles[i++] = *p >> 4;
5c90f90d	95	priv->nibbles[i++] = *p & 0xf;
252b5132 RH	96
	97	++p;
	98	priv->bytes[i] = *p;
	99	priv->nibbles[i++] = *p >> 4;
	100	priv->nibbles[i++] = *p & 0xf;
	101
	102	++p;
	103	}
	104	}
	105	priv->max_fetched = nibble;
	106	return 1;
	107	}
	108
ec22bdda	109	static char *codes[16] = {
252b5132 RH	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
ec22bdda	128	static char *ctrl_names[8] = {
6840198f NC	129	"<invld>",
	130	"flags",
	131	"fcw",
	132	"refresh",
	133	"psapseg",
	134	"psapoff",
	135	"nspseg",
	136	"nspoff"
	137	};
	138
	139	static int seg_length;
d83c6548	140	static int print_insn_z8k PARAMS ((bfd_vma, disassemble_info *, int));
5c90f90d	141	int z8k_lookup_instr PARAMS ((unsigned char , disassemble_info ));
252b5132 RH	142	static void output_instr
	143	PARAMS ((instr_data_s , unsigned long, disassemble_info ));
	144	static void unpack_instr PARAMS ((instr_data_s , int, disassemble_info ));
879db8be	145	static void unparse_instr PARAMS ((instr_data_s *, int));
252b5132 RH	146
	147	static int
	148	print_insn_z8k (addr, info, is_segmented)
	149	bfd_vma addr;
	150	disassemble_info *info;
	151	int is_segmented;
	152	{
	153	instr_data_s instr_data;
	154
	155	info->private_data = (PTR) &instr_data;
	156	instr_data.max_fetched = 0;
	157	instr_data.insn_start = addr;
	158	if (setjmp (instr_data.bailout) != 0)
	159	/* Error return. */
	160	return -1;
	161
	162	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
	163	if (instr_data.tabl_index > 0)
	164	{
	165	unpack_instr (&instr_data, is_segmented, info);
6840198f	166	unparse_instr (&instr_data, is_segmented);
252b5132	167	output_instr (&instr_data, addr, info);
6840198f	168	return z8k_table[instr_data.tabl_index].length + seg_length;
252b5132 RH	169	}
	170	else
	171	{
	172	FETCH_DATA (info, 4);
	173	(*info->fprintf_func) (info->stream, ".word %02x%02x",
	174	instr_data.bytes[0], instr_data.bytes[2]);
	175	return 2;
	176	}
	177	}
	178
	179	int
	180	print_insn_z8001 (addr, info)
	181	bfd_vma addr;
	182	disassemble_info *info;
	183	{
	184	return print_insn_z8k (addr, info, 1);
	185	}
	186
	187	int
	188	print_insn_z8002 (addr, info)
	189	bfd_vma addr;
	190	disassemble_info *info;
	191	{
	192	return print_insn_z8k (addr, info, 0);
	193	}
	194
	195	int
	196	z8k_lookup_instr (nibbles, info)
	197	unsigned char *nibbles;
	198	disassemble_info *info;
	199	{
	200
	201	int nibl_index, tabl_index;
	202	int nibl_matched;
	203	unsigned short instr_nibl;
	204	unsigned short tabl_datum, datum_class, datum_value;
	205
	206	nibl_matched = 0;
	207	tabl_index = 0;
	208	while (!nibl_matched && z8k_table[tabl_index].name)
	209	{
	210	nibl_matched = 1;
5c90f90d KH	211	for (nibl_index = 0;
	212	nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
	213	nibl_index++)
252b5132 RH	214	{
	215	if ((nibl_index % 4) == 0)
	216	/* Fetch one word at a time. */
	217	FETCH_DATA (info, nibl_index + 4);
	218	instr_nibl = nibbles[nibl_index];
	219
	220	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	221	datum_class = tabl_datum & CLASS_MASK;
	222	datum_value = ~CLASS_MASK & tabl_datum;
	223
	224	switch (datum_class)
	225	{
	226	case CLASS_BIT:
	227	if (datum_value != instr_nibl)
	228	nibl_matched = 0;
	229	break;
	230	case CLASS_00II:
	231	if (!((~instr_nibl) & 0x4))
	232	nibl_matched = 0;
	233	break;
	234	case CLASS_01II:
	235	if (!(instr_nibl & 0x4))
	236	nibl_matched = 0;
	237	break;
	238	case CLASS_0CCC:
	239	if (!((~instr_nibl) & 0x8))
	240	nibl_matched = 0;
	241	break;
	242	case CLASS_1CCC:
	243	if (!(instr_nibl & 0x8))
	244	nibl_matched = 0;
	245	break;
	246	case CLASS_0DISP7:
	247	if (!((~instr_nibl) & 0x8))
	248	nibl_matched = 0;
	249	nibl_index += 1;
	250	break;
	251	case CLASS_1DISP7:
	252	if (!(instr_nibl & 0x8))
	253	nibl_matched = 0;
	254	nibl_index += 1;
	255	break;
	256	case CLASS_REGN0:
	257	if (instr_nibl == 0)
	258	nibl_matched = 0;
	259	break;
	260	case CLASS_BIT_1OR2:
	261	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	262	nibl_matched = 0;
	263	break;
	264	default:
	265	break;
	266	}
	267	}
	268	if (nibl_matched)
	269	{
	270	return tabl_index;
	271	}
	272
	273	tabl_index++;
	274	}
	275	return -1;
252b5132 RH	276	}
	277
	278	static void
	279	output_instr (instr_data, addr, info)
	280	instr_data_s *instr_data;
d83c6548	281	unsigned long addr ATTRIBUTE_UNUSED;
252b5132 RH	282	disassemble_info *info;
	283	{
	284	int loop, loop_limit;
	285	char tmp_str[20];
	286	char out_str[100];
	287
	288	strcpy (out_str, "\t");
	289
6840198f	290	loop_limit = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
252b5132 RH	291	FETCH_DATA (info, loop_limit);
	292	for (loop = 0; loop < loop_limit; loop++)
	293	{
	294	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
	295	strcat (out_str, tmp_str);
	296	}
	297
	298	while (loop++ < 8)
	299	{
	300	strcat (out_str, " ");
	301	}
	302
	303	strcat (out_str, instr_data->instr_asmsrc);
	304
	305	(*info->fprintf_func) (info->stream, "%s", out_str);
	306	}
	307
	308	static void
	309	unpack_instr (instr_data, is_segmented, info)
	310	instr_data_s *instr_data;
	311	int is_segmented;
	312	disassemble_info *info;
	313	{
	314	int nibl_count, loop;
	315	unsigned short instr_nibl, instr_byte, instr_word;
	316	long instr_long;
6840198f NC	317	unsigned int tabl_datum, datum_class;
6840198f NC	318	unsigned short datum_value;
252b5132 RH	319
	320	nibl_count = 0;
	321	loop = 0;
6840198f	322	seg_length = 0;
252b5132 RH	323	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	324	{
	325	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	326	instr_nibl = instr_data->nibbles[nibl_count];
ec22bdda KH	327	instr_byte = instr_data->bytes[nibl_count & ~1];
ec22bdda KH	328	instr_word = instr_data->words[nibl_count & ~3];
252b5132 RH	329
	330	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	331	datum_class = tabl_datum & CLASS_MASK;
	332	datum_value = tabl_datum & ~CLASS_MASK;
	333
	334	switch (datum_class)
	335	{
252b5132 RH	336	case CLASS_DISP:
	337	switch (datum_value)
	338	{
	339	case ARG_DISP16:
7f6621cd KH	340	instr_data->displacement = instr_data->insn_start + 4
7f6621cd KH	341	+ (signed short) (instr_word & 0xffff);
252b5132 RH	342	nibl_count += 3;
	343	break;
	344	case ARG_DISP12:
7f6621cd	345	if (instr_word & 0x800)
ec22bdda KH	346	{
	347	/* neg. 12 bit displacement */
	348	instr_data->displacement = instr_data->insn_start + 2
	349	- (signed short) ((instr_word & 0xfff) \| 0xf000) * 2;
	350	}
7f6621cd	351	else
ec22bdda KH	352	{
	353	instr_data->displacement = instr_data->insn_start + 2
	354	- (instr_word & 0x0fff) * 2;
7f6621cd	355	}
252b5132 RH	356	nibl_count += 2;
	357	break;
	358	default:
	359	break;
	360	}
	361	break;
	362	case CLASS_IMM:
	363	switch (datum_value)
	364	{
	365	case ARG_IMM4:
	366	instr_data->immediate = instr_nibl;
	367	break;
	368	case ARG_NIM8:
	369	instr_data->immediate = (-instr_byte);
	370	nibl_count += 1;
	371	break;
	372	case ARG_IMM8:
	373	instr_data->immediate = instr_byte;
	374	nibl_count += 1;
	375	break;
	376	case ARG_IMM16:
	377	instr_data->immediate = instr_word;
	378	nibl_count += 3;
	379	break;
	380	case ARG_IMM32:
	381	FETCH_DATA (info, nibl_count + 8);
	382	instr_long = (instr_data->words[nibl_count] << 16)
	383	\| (instr_data->words[nibl_count + 4]);
	384	instr_data->immediate = instr_long;
	385	nibl_count += 7;
	386	break;
	387	case ARG_IMMN:
	388	instr_data->immediate = instr_nibl - 1;
	389	break;
	390	case ARG_IMM4M1:
	391	instr_data->immediate = instr_nibl + 1;
	392	break;
	393	case ARG_IMM_1:
	394	instr_data->immediate = 1;
	395	break;
	396	case ARG_IMM_2:
	397	instr_data->immediate = 2;
	398	break;
	399	case ARG_IMM2:
	400	instr_data->immediate = instr_nibl & 0x3;
	401	break;
	402	default:
	403	break;
	404	}
	405	break;
	406	case CLASS_CC:
	407	instr_data->cond_code = instr_nibl;
	408	break;
252b5132 RH	409	case CLASS_ADDRESS:
	410	if (is_segmented)
	411	{
	412	if (instr_nibl & 0x8)
	413	{
	414	FETCH_DATA (info, nibl_count + 8);
	415	instr_long = (instr_data->words[nibl_count] << 16)
	416	\| (instr_data->words[nibl_count + 4]);
7f6621cd KH	417	instr_data->address = ((instr_word & 0x7f00) << 8)
7f6621cd KH	418	+ (instr_long & 0xffff);
252b5132	419	nibl_count += 7;
7f6621cd	420	seg_length = 2;
252b5132 RH	421	}
	422	else
	423	{
7f6621cd KH	424	instr_data->address = ((instr_word & 0x7f00) << 8)
7f6621cd KH	425	+ (instr_word & 0x00ff);
252b5132 RH	426	nibl_count += 3;
	427	}
	428	}
	429	else
	430	{
	431	instr_data->address = instr_word;
	432	nibl_count += 3;
	433	}
	434	break;
	435	case CLASS_0CCC:
252b5132	436	case CLASS_1CCC:
6840198f	437	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132 RH	438	break;
252b5132 RH	439	case CLASS_0DISP7:
7f6621cd KH	440	instr_data->displacement =
7f6621cd KH	441	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	442	nibl_count += 1;
	443	break;
	444	case CLASS_1DISP7:
7f6621cd KH	445	instr_data->displacement =
7f6621cd KH	446	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	447	nibl_count += 1;
	448	break;
	449	case CLASS_01II:
	450	instr_data->interrupts = instr_nibl & 0x3;
	451	break;
	452	case CLASS_00II:
	453	instr_data->interrupts = instr_nibl & 0x3;
	454	break;
	455	case CLASS_BIT:
6840198f	456	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132	457	break;
252b5132 RH	458	case CLASS_FLAGS:
	459	instr_data->flags = instr_nibl;
	460	break;
	461	case CLASS_REG:
	462	instr_data->arg_reg[datum_value] = instr_nibl;
	463	break;
252b5132 RH	464	case CLASS_REGN0:
	465	instr_data->arg_reg[datum_value] = instr_nibl;
	466	break;
7f6621cd KH	467	case CLASS_DISP8:
	468	instr_data->displacement =
	469	instr_data->insn_start + 2 + (signed char) instr_byte * 2;
6840198f	470	nibl_count += 1;
7f6621cd	471	break;
252b5132	472	default:
7f6621cd	473	abort ();
252b5132 RH	474	break;
	475	}
	476
	477	loop += 1;
	478	nibl_count += 1;
	479	}
	480	}
	481
	482	static void
ec22bdda	483	unparse_instr (instr_data, is_segmented)
252b5132	484	instr_data_s *instr_data;
6840198f	485	int is_segmented;
252b5132	486	{
6840198f NC	487	unsigned short datum_value;
6840198f NC	488	unsigned int tabl_datum, datum_class;
252b5132 RH	489	int loop, loop_limit;
	490	char out_str[80], tmp_str[25];
	491
	492	sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
	493
	494	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	495	for (loop = 0; loop < loop_limit; loop++)
	496	{
	497	if (loop)
	498	strcat (out_str, ",");
	499
	500	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	501	datum_class = tabl_datum & CLASS_MASK;
	502	datum_value = tabl_datum & ~CLASS_MASK;
	503
	504	switch (datum_class)
	505	{
	506	case CLASS_X:
	507	sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
	508	instr_data->arg_reg[datum_value]);
	509	strcat (out_str, tmp_str);
	510	break;
	511	case CLASS_BA:
	512	sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
	513	instr_data->immediate);
	514	strcat (out_str, tmp_str);
	515	break;
	516	case CLASS_BX:
	517	sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
	518	instr_data->arg_reg[ARG_RX]);
	519	strcat (out_str, tmp_str);
	520	break;
	521	case CLASS_DISP:
6840198f	522	sprintf (tmp_str, "0x%0lx", instr_data->displacement);
252b5132 RH	523	strcat (out_str, tmp_str);
	524	break;
	525	case CLASS_IMM:
	526	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
	527	strcat (out_str, tmp_str);
	528	break;
	529	case CLASS_CC:
	530	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	531	strcat (out_str, tmp_str);
	532	break;
	533	case CLASS_CTRL:
6840198f	534	sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
252b5132 RH	535	strcat (out_str, tmp_str);
	536	break;
	537	case CLASS_DA:
	538	case CLASS_ADDRESS:
6840198f	539	sprintf (tmp_str, "0x%0lx", instr_data->address);
252b5132 RH	540	strcat (out_str, tmp_str);
	541	break;
	542	case CLASS_IR:
a5d2034a NC	543	if (is_segmented)
	544	sprintf (tmp_str, "@rr%ld", instr_data->arg_reg[datum_value]);
	545	else
	546	sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	547	strcat (out_str, tmp_str);
	548	break;
	549	case CLASS_FLAGS:
	550	sprintf (tmp_str, "0x%0lx", instr_data->flags);
	551	strcat (out_str, tmp_str);
	552	break;
	553	case CLASS_REG_BYTE:
	554	if (instr_data->arg_reg[datum_value] >= 0x8)
a5d2034a NC	555	sprintf (tmp_str, "rl%ld",
a5d2034a NC	556	instr_data->arg_reg[datum_value] - 0x8);
252b5132	557	else
a5d2034a	558	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	559	strcat (out_str, tmp_str);
	560	break;
	561	case CLASS_REG_WORD:
	562	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	563	strcat (out_str, tmp_str);
	564	break;
	565	case CLASS_REG_QUAD:
	566	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
	567	strcat (out_str, tmp_str);
	568	break;
	569	case CLASS_REG_LONG:
	570	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	571	strcat (out_str, tmp_str);
	572	break;
6840198f	573	case CLASS_PR:
7f6621cd KH	574	if (is_segmented)
	575	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	576	else
	577	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
6840198f NC	578	strcat (out_str, tmp_str);
6840198f NC	579	break;
252b5132	580	default:
7f6621cd	581	abort ();
252b5132 RH	582	break;
	583	}
	584	}
	585
	586	strcpy (instr_data->instr_asmsrc, out_str);
	587	}