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

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

This file is part of GNU Binutils.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

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

#define DEFINE_TABLE
#include "z8k-opc.h"

\f
#include <setjmp.h>

\f
typedef struct
{
  /* These are all indexed by nibble number (i.e only every other entry
     of bytes is used, and every 4th entry of words).  */
  unsigned char nibbles[24];
  unsigned char bytes[24];
  unsigned short words[24];

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

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

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

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

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

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

  {
    int i;
    unsigned char *p = mybuf ;
    
    for (i = 0; i < nibble;)
      {
	priv->words[i] = (p[0] << 8) | p[1];
	
	priv->bytes[i] = *p;
	priv->nibbles[i++] = *p >> 4;
	priv->nibbles[i++] = *p &0xf;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

      tabl_index++;
    }
  return -1;

}

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

  strcpy (out_str, "\t");

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

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

  strcat (out_str, instr_data->instr_asmsrc);

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

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

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

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

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

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

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

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

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

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

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

  strcpy (instr_data->instr_asmsrc, out_str);
}
Commit	Line	Data
252b5132 RH	1	/* Disassemble z8000 code.
	2	Copyright 1992, 1993, 1995, 1998 Free Software Foundation, Inc.
	3
	4	This file is part of GNU Binutils.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	19
252b5132 RH	20	#include "sysdep.h"
	21	#include "dis-asm.h"
	22
	23	#define DEFINE_TABLE
	24	#include "z8k-opc.h"
	25
	26	\f
	27	#include <setjmp.h>
	28
	29	\f
	30	typedef struct
	31	{
	32	/* These are all indexed by nibble number (i.e only every other entry
	33	of bytes is used, and every 4th entry of words). */
	34	unsigned char nibbles[24];
	35	unsigned char bytes[24];
	36	unsigned short words[24];
	37
	38	/* Nibble number of first word not yet fetched. */
	39	int max_fetched;
	40	bfd_vma insn_start;
	41	jmp_buf bailout;
	42
	43	long tabl_index;
	44	char instr_asmsrc[80];
	45	unsigned long arg_reg[0x0f];
	46	unsigned long immediate;
	47	unsigned long displacement;
	48	unsigned long address;
	49	unsigned long cond_code;
	50	unsigned long ctrl_code;
	51	unsigned long flags;
	52	unsigned long interrupts;
	53	}
	54	instr_data_s;
	55
	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) \
	60	((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
	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;
	70	instr_data_s priv = (instr_data_s )info->private_data;
	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;
87	unsigned char *p = mybuf ;
88
89	for (i = 0; i < nibble;)
90	{
91	priv->words[i] = (p[0] << 8) \| p[1];
92
93	priv->bytes[i] = *p;
94	priv->nibbles[i++] = *p >> 4;
95	priv->nibbles[i++] = *p &0xf;
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
109	static char *codes[16] =
110	{
111	"f",
112	"lt",
113	"le",
114	"ule",
115	"ov/pe",
116	"mi",
117	"eq",
118	"c/ult",
119	"t",
120	"ge",
121	"gt",
122	"ugt",
123	"nov/po",
124	"pl",
125	"ne",
126	"nc/uge"
127	};
128
129	int z8k_lookup_instr PARAMS ((unsigned char, disassemble_info ));
130	static void output_instr
131	PARAMS ((instr_data_s , unsigned long, disassemble_info ));
132	static void unpack_instr PARAMS ((instr_data_s , int, disassemble_info ));
133	static void unparse_instr PARAMS ((instr_data_s *));
134
135	static int
136	print_insn_z8k (addr, info, is_segmented)
137	bfd_vma addr;
138	disassemble_info *info;
139	int is_segmented;
140	{
141	instr_data_s instr_data;
142
143	info->private_data = (PTR) &instr_data;
144	instr_data.max_fetched = 0;
145	instr_data.insn_start = addr;
146	if (setjmp (instr_data.bailout) != 0)
147	/* Error return. */
148	return -1;
149
150	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
151	if (instr_data.tabl_index > 0)
152	{
153	unpack_instr (&instr_data, is_segmented, info);
154	unparse_instr (&instr_data);
155	output_instr (&instr_data, addr, info);
156	return z8k_table[instr_data.tabl_index].length;
157	}
158	else
159	{
160	FETCH_DATA (info, 4);
161	(*info->fprintf_func) (info->stream, ".word %02x%02x",
162	instr_data.bytes[0], instr_data.bytes[2]);
163	return 2;
164	}
165	}
166
167	int
168	print_insn_z8001 (addr, info)
169	bfd_vma addr;
170	disassemble_info *info;
171	{
172	return print_insn_z8k (addr, info, 1);
173	}
174
175	int
176	print_insn_z8002 (addr, info)
177	bfd_vma addr;
178	disassemble_info *info;
179	{
180	return print_insn_z8k (addr, info, 0);
181	}
182
183	int
184	z8k_lookup_instr (nibbles, info)
185	unsigned char *nibbles;
186	disassemble_info *info;
187	{
188
189	int nibl_index, tabl_index;
190	int nibl_matched;
191	unsigned short instr_nibl;
192	unsigned short tabl_datum, datum_class, datum_value;
193
194	nibl_matched = 0;
195	tabl_index = 0;
196	while (!nibl_matched && z8k_table[tabl_index].name)
197	{
198	nibl_matched = 1;
199	for (nibl_index = 0; nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched; nibl_index++)
200	{
201	if ((nibl_index % 4) == 0)
202	/* Fetch one word at a time. */
203	FETCH_DATA (info, nibl_index + 4);
204	instr_nibl = nibbles[nibl_index];
205
206	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
207	datum_class = tabl_datum & CLASS_MASK;
208	datum_value = ~CLASS_MASK & tabl_datum;
209
210	switch (datum_class)
211	{
212	case CLASS_BIT:
213	if (datum_value != instr_nibl)
214	nibl_matched = 0;
215	break;
216	case CLASS_00II:
217	if (!((~instr_nibl) & 0x4))
218	nibl_matched = 0;
219	break;
220	case CLASS_01II:
221	if (!(instr_nibl & 0x4))
222	nibl_matched = 0;
223	break;
224	case CLASS_0CCC:
225	if (!((~instr_nibl) & 0x8))
226	nibl_matched = 0;
227	break;
228	case CLASS_1CCC:
229	if (!(instr_nibl & 0x8))
230	nibl_matched = 0;
231	break;
232	case CLASS_0DISP7:
233	if (!((~instr_nibl) & 0x8))
234	nibl_matched = 0;
235	nibl_index += 1;
236	break;
237	case CLASS_1DISP7:
238	if (!(instr_nibl & 0x8))
239	nibl_matched = 0;
240	nibl_index += 1;
241	break;
242	case CLASS_REGN0:
243	if (instr_nibl == 0)
244	nibl_matched = 0;
245	break;
246	case CLASS_BIT_1OR2:
247	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
248	nibl_matched = 0;
249	break;
250	default:
251	break;
252	}
253	}
254	if (nibl_matched)
255	{
256	return tabl_index;
257	}
258
259	tabl_index++;
260	}
261	return -1;
262
263	}
264
265	static void
266	output_instr (instr_data, addr, info)
267	instr_data_s *instr_data;
268	unsigned long addr;
269	disassemble_info *info;
270	{
271	int loop, loop_limit;
272	char tmp_str[20];
273	char out_str[100];
274
275	strcpy (out_str, "\t");
276
277	loop_limit = z8k_table[instr_data->tabl_index].length * 2;
278	FETCH_DATA (info, loop_limit);
279	for (loop = 0; loop < loop_limit; loop++)
280	{
281	sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
282	strcat (out_str, tmp_str);
283	}
284
285	while (loop++ < 8)
286	{
287	strcat (out_str, " ");
288	}
289
290	strcat (out_str, instr_data->instr_asmsrc);
291
292	(*info->fprintf_func) (info->stream, "%s", out_str);
293	}
294
295	static void
296	unpack_instr (instr_data, is_segmented, info)
297	instr_data_s *instr_data;
298	int is_segmented;
299	disassemble_info *info;
300	{
301	int nibl_count, loop;
302	unsigned short instr_nibl, instr_byte, instr_word;
303	long instr_long;
304	unsigned short tabl_datum, datum_class, datum_value;
305
306	nibl_count = 0;
307	loop = 0;
308	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
309	{
310	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
311	instr_nibl = instr_data->nibbles[nibl_count];
312	instr_byte = instr_data->bytes[nibl_count];
313	instr_word = instr_data->words[nibl_count];
314
315	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
316	datum_class = tabl_datum & CLASS_MASK;
317	datum_value = tabl_datum & ~CLASS_MASK;
318
319	switch (datum_class)
320	{
321	case CLASS_X:
322	instr_data->address = instr_nibl;
323	break;
324	case CLASS_BA:
325	instr_data->displacement = instr_nibl;
326	break;
327	case CLASS_BX:
328	instr_data->arg_reg[datum_value] = instr_nibl;
329	break;
330	case CLASS_DISP:
331	switch (datum_value)
332	{
333	case ARG_DISP16:
334	instr_data->displacement = instr_word;
335	nibl_count += 3;
336	break;
337	case ARG_DISP12:
338	instr_data->displacement = instr_word & 0x0fff;
339	nibl_count += 2;
340	break;
341	default:
342	break;
343	}
344	break;
345	case CLASS_IMM:
346	switch (datum_value)
347	{
348	case ARG_IMM4:
349	instr_data->immediate = instr_nibl;
350	break;
351	case ARG_NIM8:
352	instr_data->immediate = (-instr_byte);
353	nibl_count += 1;
354	break;
355	case ARG_IMM8:
356	instr_data->immediate = instr_byte;
357	nibl_count += 1;
358	break;
359	case ARG_IMM16:
360	instr_data->immediate = instr_word;
361	nibl_count += 3;
362	break;
363	case ARG_IMM32:
364	FETCH_DATA (info, nibl_count + 8);
365	instr_long = (instr_data->words[nibl_count] << 16)
366	\| (instr_data->words[nibl_count + 4]);
367	instr_data->immediate = instr_long;
368	nibl_count += 7;
369	break;
370	case ARG_IMMN:
371	instr_data->immediate = instr_nibl - 1;
372	break;
373	case ARG_IMM4M1:
374	instr_data->immediate = instr_nibl + 1;
375	break;
376	case ARG_IMM_1:
377	instr_data->immediate = 1;
378	break;
379	case ARG_IMM_2:
380	instr_data->immediate = 2;
381	break;
382	case ARG_IMM2:
383	instr_data->immediate = instr_nibl & 0x3;
384	break;
385	default:
386	break;
387	}
388	break;
389	case CLASS_CC:
390	instr_data->cond_code = instr_nibl;
391	break;
392	case CLASS_CTRL:
393	instr_data->ctrl_code = instr_nibl;
394	break;
395	case CLASS_DA:
396	case CLASS_ADDRESS:
397	if (is_segmented)
398	{
399	if (instr_nibl & 0x8)
400	{
401	FETCH_DATA (info, nibl_count + 8);
402	instr_long = (instr_data->words[nibl_count] << 16)
403	\| (instr_data->words[nibl_count + 4]);
404	instr_data->address = ((instr_word & 0x7f00) << 8) +
405	(instr_long & 0xffff);
406	nibl_count += 7;
407	}
408	else
409	{
410	instr_data->address = ((instr_word & 0x7f00) << 8) +
411	(instr_word & 0x00ff);
412	nibl_count += 3;
413	}
414	}
415	else
416	{
417	instr_data->address = instr_word;
418	nibl_count += 3;
419	}
420	break;
421	case CLASS_0CCC:
422	instr_data->cond_code = instr_nibl & 0x7;
423	break;
424	case CLASS_1CCC:
425	instr_data->cond_code = instr_nibl & 0x7;
426	break;
427	case CLASS_0DISP7:
428	instr_data->displacement = instr_byte & 0x7f;
429	nibl_count += 1;
430	break;
431	case CLASS_1DISP7:
432	instr_data->displacement = instr_byte & 0x7f;
433	nibl_count += 1;
434	break;
435	case CLASS_01II:
436	instr_data->interrupts = instr_nibl & 0x3;
437	break;
438	case CLASS_00II:
439	instr_data->interrupts = instr_nibl & 0x3;
440	break;
441	case CLASS_BIT:
442	/* do nothing */
443	break;
444	case CLASS_IR:
445	instr_data->arg_reg[datum_value] = instr_nibl;
446	break;
447	case CLASS_FLAGS:
448	instr_data->flags = instr_nibl;
449	break;
450	case CLASS_REG:
451	instr_data->arg_reg[datum_value] = instr_nibl;
452	break;
453	case CLASS_REG_BYTE:
454	instr_data->arg_reg[datum_value] = instr_nibl;
455	break;
456	case CLASS_REG_WORD:
457	instr_data->arg_reg[datum_value] = instr_nibl;
458	break;
459	case CLASS_REG_QUAD:
460	instr_data->arg_reg[datum_value] = instr_nibl;
461	break;
462	case CLASS_REG_LONG:
463	instr_data->arg_reg[datum_value] = instr_nibl;
464	break;
465	case CLASS_REGN0:
466	instr_data->arg_reg[datum_value] = instr_nibl;
467	break;
468	default:
469	break;
470	}
471
472	loop += 1;
473	nibl_count += 1;
474	}
475	}
476
477	static void
478	unparse_instr (instr_data)
479	instr_data_s *instr_data;
480	{
481	unsigned short tabl_datum, datum_class, datum_value;
482	int loop, loop_limit;
483	char out_str[80], tmp_str[25];
484
485	sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
486
487	loop_limit = z8k_table[instr_data->tabl_index].noperands;
488	for (loop = 0; loop < loop_limit; loop++)
489	{
490	if (loop)
491	strcat (out_str, ",");
492
493	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
494	datum_class = tabl_datum & CLASS_MASK;
495	datum_value = tabl_datum & ~CLASS_MASK;
496
497	switch (datum_class)
498	{
499	case CLASS_X:
500	sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
501	instr_data->arg_reg[datum_value]);
502	strcat (out_str, tmp_str);
503	break;
504	case CLASS_BA:
505	sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
506	instr_data->immediate);
507	strcat (out_str, tmp_str);
508	break;
509	case CLASS_BX:
510	sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
511	instr_data->arg_reg[ARG_RX]);
512	strcat (out_str, tmp_str);
513	break;
514	case CLASS_DISP:
515	sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
516	strcat (out_str, tmp_str);
517	break;
518	case CLASS_IMM:
519	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
520	strcat (out_str, tmp_str);
521	break;
522	case CLASS_CC:
523	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
524	strcat (out_str, tmp_str);
525	break;
526	case CLASS_CTRL:
527	sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
528	strcat (out_str, tmp_str);
529	break;
530	case CLASS_DA:
531	case CLASS_ADDRESS:
532	sprintf (tmp_str, "#0x%0lx", instr_data->address);
533	strcat (out_str, tmp_str);
534	break;
535	case CLASS_IR:
536	sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
537	strcat (out_str, tmp_str);
538	break;
539	case CLASS_FLAGS:
540	sprintf (tmp_str, "0x%0lx", instr_data->flags);
541	strcat (out_str, tmp_str);
542	break;
543	case CLASS_REG_BYTE:
544	if (instr_data->arg_reg[datum_value] >= 0x8)
545	{
546	sprintf (tmp_str, "rl%ld",
547	instr_data->arg_reg[datum_value] - 0x8);
548	}
549	else
550	{
551	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
552	}
553	strcat (out_str, tmp_str);
554	break;
555	case CLASS_REG_WORD:
556	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
557	strcat (out_str, tmp_str);
558	break;
559	case CLASS_REG_QUAD:
560	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
561	strcat (out_str, tmp_str);
562	break;
563	case CLASS_REG_LONG:
564	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
565	strcat (out_str, tmp_str);
566	break;
567	default:
568	break;
569	}
570	}
571
572	strcpy (instr_data->instr_asmsrc, out_str);
573	}