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

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

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.
060d22b0	2	Copyright 1992, 1993, 1998, 2000
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;
	272
	273	}
274
275	static void
276	output_instr (instr_data, addr, info)
277	instr_data_s *instr_data;
278	unsigned long addr;
279	disassemble_info *info;
280	{
281	int loop, loop_limit;
282	char tmp_str[20];
283	char out_str[100];
284
285	strcpy (out_str, "\t");
286
6840198f	287	loop_limit = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
252b5132 RH	288	FETCH_DATA (info, loop_limit);
	289	for (loop = 0; loop < loop_limit; loop++)
	290	{
	291	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
	292	strcat (out_str, tmp_str);
	293	}
	294
	295	while (loop++ < 8)
	296	{
	297	strcat (out_str, " ");
	298	}
	299
	300	strcat (out_str, instr_data->instr_asmsrc);
	301
	302	(*info->fprintf_func) (info->stream, "%s", out_str);
	303	}
	304
	305	static void
	306	unpack_instr (instr_data, is_segmented, info)
	307	instr_data_s *instr_data;
	308	int is_segmented;
	309	disassemble_info *info;
	310	{
	311	int nibl_count, loop;
	312	unsigned short instr_nibl, instr_byte, instr_word;
	313	long instr_long;
6840198f NC	314	unsigned int tabl_datum, datum_class;
6840198f NC	315	unsigned short datum_value;
252b5132 RH	316
	317	nibl_count = 0;
	318	loop = 0;
6840198f	319	seg_length = 0;
252b5132 RH	320	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	321	{
	322	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	323	instr_nibl = instr_data->nibbles[nibl_count];
ec22bdda KH	324	instr_byte = instr_data->bytes[nibl_count & ~1];
ec22bdda KH	325	instr_word = instr_data->words[nibl_count & ~3];
252b5132 RH	326
	327	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	328	datum_class = tabl_datum & CLASS_MASK;
	329	datum_value = tabl_datum & ~CLASS_MASK;
	330
	331	switch (datum_class)
	332	{
252b5132 RH	333	case CLASS_DISP:
	334	switch (datum_value)
	335	{
	336	case ARG_DISP16:
6840198f	337	instr_data->displacement = instr_data->insn_start + 4 +
ec22bdda	338	(signed short) (instr_word & 0xffff);
252b5132 RH	339	nibl_count += 3;
	340	break;
	341	case ARG_DISP12:
ec22bdda KH	342	if (instr_word & 0x800)
	343	{
	344	/* neg. 12 bit displacement */
	345	instr_data->displacement = instr_data->insn_start + 2
	346	- (signed short) ((instr_word & 0xfff) \| 0xf000) * 2;
	347	}
	348	else
	349	{
	350	instr_data->displacement = instr_data->insn_start + 2
	351	- (instr_word & 0x0fff) * 2;
6840198f	352	}
252b5132 RH	353	nibl_count += 2;
	354	break;
	355	default:
	356	break;
	357	}
	358	break;
	359	case CLASS_IMM:
	360	switch (datum_value)
	361	{
	362	case ARG_IMM4:
	363	instr_data->immediate = instr_nibl;
	364	break;
	365	case ARG_NIM8:
	366	instr_data->immediate = (-instr_byte);
	367	nibl_count += 1;
	368	break;
	369	case ARG_IMM8:
	370	instr_data->immediate = instr_byte;
	371	nibl_count += 1;
	372	break;
	373	case ARG_IMM16:
	374	instr_data->immediate = instr_word;
	375	nibl_count += 3;
	376	break;
	377	case ARG_IMM32:
	378	FETCH_DATA (info, nibl_count + 8);
	379	instr_long = (instr_data->words[nibl_count] << 16)
	380	\| (instr_data->words[nibl_count + 4]);
	381	instr_data->immediate = instr_long;
	382	nibl_count += 7;
	383	break;
	384	case ARG_IMMN:
	385	instr_data->immediate = instr_nibl - 1;
	386	break;
	387	case ARG_IMM4M1:
	388	instr_data->immediate = instr_nibl + 1;
	389	break;
	390	case ARG_IMM_1:
	391	instr_data->immediate = 1;
	392	break;
	393	case ARG_IMM_2:
	394	instr_data->immediate = 2;
	395	break;
	396	case ARG_IMM2:
	397	instr_data->immediate = instr_nibl & 0x3;
	398	break;
	399	default:
	400	break;
	401	}
	402	break;
	403	case CLASS_CC:
	404	instr_data->cond_code = instr_nibl;
	405	break;
252b5132 RH	406	case CLASS_ADDRESS:
	407	if (is_segmented)
	408	{
	409	if (instr_nibl & 0x8)
	410	{
	411	FETCH_DATA (info, nibl_count + 8);
	412	instr_long = (instr_data->words[nibl_count] << 16)
	413	\| (instr_data->words[nibl_count + 4]);
	414	instr_data->address = ((instr_word & 0x7f00) << 8) +
	415	(instr_long & 0xffff);
	416	nibl_count += 7;
6840198f	417	seg_length = 2;
252b5132 RH	418	}
	419	else
	420	{
	421	instr_data->address = ((instr_word & 0x7f00) << 8) +
	422	(instr_word & 0x00ff);
	423	nibl_count += 3;
	424	}
	425	}
	426	else
	427	{
	428	instr_data->address = instr_word;
	429	nibl_count += 3;
	430	}
	431	break;
	432	case CLASS_0CCC:
252b5132	433	case CLASS_1CCC:
6840198f	434	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132 RH	435	break;
252b5132 RH	436	case CLASS_0DISP7:
6840198f	437	instr_data->displacement = instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	438	nibl_count += 1;
	439	break;
	440	case CLASS_1DISP7:
6840198f	441	instr_data->displacement = instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	442	nibl_count += 1;
	443	break;
	444	case CLASS_01II:
	445	instr_data->interrupts = instr_nibl & 0x3;
	446	break;
	447	case CLASS_00II:
	448	instr_data->interrupts = instr_nibl & 0x3;
	449	break;
	450	case CLASS_BIT:
6840198f	451	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132	452	break;
252b5132 RH	453	case CLASS_FLAGS:
	454	instr_data->flags = instr_nibl;
	455	break;
	456	case CLASS_REG:
	457	instr_data->arg_reg[datum_value] = instr_nibl;
	458	break;
252b5132 RH	459	case CLASS_REGN0:
	460	instr_data->arg_reg[datum_value] = instr_nibl;
	461	break;
6840198f NC	462	case CLASS_DISP8:
	463	instr_data->displacement = instr_data->insn_start + 2 + (signed char)instr_byte * 2;
	464	nibl_count += 1;
	465	break;
252b5132	466	default:
879db8be	467	abort ();
252b5132 RH	468	break;
	469	}
	470
	471	loop += 1;
	472	nibl_count += 1;
	473	}
	474	}
	475
	476	static void
ec22bdda	477	unparse_instr (instr_data, is_segmented)
252b5132	478	instr_data_s *instr_data;
6840198f	479	int is_segmented;
252b5132	480	{
6840198f NC	481	unsigned short datum_value;
6840198f NC	482	unsigned int tabl_datum, datum_class;
252b5132 RH	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:
6840198f	516	sprintf (tmp_str, "0x%0lx", instr_data->displacement);
252b5132 RH	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:
6840198f	528	sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
252b5132 RH	529	strcat (out_str, tmp_str);
	530	break;
	531	case CLASS_DA:
	532	case CLASS_ADDRESS:
6840198f	533	sprintf (tmp_str, "0x%0lx", instr_data->address);
252b5132 RH	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;
6840198f NC	568	case CLASS_PR:
	569	if (is_segmented)
	570	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	571	else
	572	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	573	strcat (out_str, tmp_str);
	574	break;
252b5132	575	default:
879db8be	576	abort ();
252b5132 RH	577	break;
	578	}
	579	}
	580
	581	strcpy (instr_data->instr_asmsrc, out_str);
	582	}