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

/* Disassemble z8000 code.
   Copyright (C) 1992-2014 Free Software Foundation, Inc.

   This file is part of the GNU opcodes library.

   This library 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 3, or (at your option)
   any later version.

   It 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 file; see the file COPYING.  If not, write to the
   Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

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

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

#include <setjmp.h>

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;
  OPCODES_SIGJMP_BUF bailout;

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

static int
print_insn_z8k (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 (OPCODES_SIGSETJMP (instr_data.bailout) != 0)
    /* Error return.  */
    return -1;

  info->bytes_per_chunk = 2;
  info->bytes_per_line = 6;
  info->display_endian = BFD_ENDIAN_BIG;

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

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

int
z8k_lookup_instr (unsigned char *nibbles, disassemble_info *info)
{
  int nibl_index, tabl_index;
  int nibl_matched;
  int need_fetch = 0;
  unsigned short instr_nibl;
  unsigned short tabl_datum, datum_class, datum_value;

  nibl_matched = 0;
  tabl_index = 0;
  FETCH_DATA (info, 4);
  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 data only if it isn't already there.  */
              if (nibl_index >= 4 || (nibl_index < 4 && need_fetch))
                FETCH_DATA (info, nibl_index + 4);   /* Fetch one word at a time.  */
              if (nibl_index < 4)
                need_fetch = 0;
              else
                need_fetch = 1;
            }
	  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_IGNORE:
	      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_s *instr_data,
              unsigned long addr ATTRIBUTE_UNUSED,
              disassemble_info *info)
{
  int num_bytes;
  char out_str[100];

  out_str[0] = 0;

  num_bytes = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
  FETCH_DATA (info, num_bytes);

  strcat (out_str, instr_data->instr_asmsrc);

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

static void
unpack_instr (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)
		/* Negative 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_NIM4:
	      instr_data->immediate = (- instr_nibl) & 0xf;
	      break;
	    case ARG_NIM8:
	      instr_data->immediate = (- instr_byte) & 0xff;
	      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) << 16)
		    + (instr_long & 0xffff);
		  nibl_count += 7;
		  seg_length = 2;
		}
	      else
		{
		  instr_data->address = ((instr_word & 0x7f00) << 16)
		    + (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_IGNORE:
	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;
        case CLASS_BIT_1OR2:
          instr_data->immediate = ((instr_nibl >> 1) & 0x1) + 1;
          nibl_count += 1;
	  break;
	default:
	  abort ();
	  break;
	}

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

static void
print_intr(char *tmp_str, unsigned long interrupts)
{
  int comma = 0;

  *tmp_str = 0;
  if (! (interrupts & 2))
    {
      strcat (tmp_str, "vi");
      comma = 1;
    }
  if (! (interrupts & 1))
    {
      if (comma) strcat (tmp_str, ",");
      strcat (tmp_str, "nvi");
    }
}

static void
print_flags(char *tmp_str, unsigned long flags)
{
  int comma = 0;

  *tmp_str = 0;
  if (flags & 8)
    {
      strcat (tmp_str, "c");
      comma = 1;
    }
  if (flags & 4)
    {
      if (comma) strcat (tmp_str, ",");
      strcat (tmp_str, "z");
      comma = 1;
    }
  if (flags & 2)
    {
      if (comma) strcat (tmp_str, ",");
      strcat (tmp_str, "s");
      comma = 1;
    }
  if (flags & 1)
    {
      if (comma) strcat (tmp_str, ",");
      strcat (tmp_str, "p");
    }
}

static void
unparse_instr (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, "%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:
          if (is_segmented)
            sprintf (tmp_str, "rr%ld(#0x%lx)", instr_data->arg_reg[datum_value],
                     instr_data->immediate);
          else
            sprintf (tmp_str, "r%ld(#0x%lx)", instr_data->arg_reg[datum_value],
                     instr_data->immediate);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_BX:
          if (is_segmented)
            sprintf (tmp_str, "rr%ld(r%ld)", instr_data->arg_reg[datum_value],
                     instr_data->arg_reg[ARG_RX]);
          else
            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:
	  if (datum_value == ARG_IMM2)	/* True with EI/DI instructions only.  */
	    {
	      print_intr (tmp_str, instr_data->interrupts);
	      strcat (out_str, tmp_str);
	      break;
	    }
	  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_IRO:
          sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
	  strcat (out_str, tmp_str);
	  break;
	case CLASS_FLAGS:
	  print_flags(tmp_str, 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.
4b95cf5c	2	Copyright (C) 1992-2014 Free Software Foundation, Inc.
252b5132	3
9b201bb5	4	This file is part of the GNU opcodes library.
252b5132	5
9b201bb5	6	This library is free software; you can redistribute it and/or modify
3c25c5f6	7	it under the terms of the GNU General Public License as published by
9b201bb5 NC	8	the Free Software Foundation; either version 3, or (at your option)
9b201bb5 NC	9	any later version.
252b5132	10
9b201bb5 NC	11	It is distributed in the hope that it will be useful, but WITHOUT
	12	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	13	or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
	14	License for more details.
252b5132	15
3c25c5f6	16	You should have received a copy of the GNU General Public License
9b201bb5 NC	17	along with this file; see the file COPYING. If not, write to the
	18	Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
	19	MA 02110-1301, USA. */
252b5132	20
252b5132 RH	21	#include "sysdep.h"
	22	#include "dis-asm.h"
	23
	24	#define DEFINE_TABLE
	25	#include "z8k-opc.h"
c8fd013c	26
252b5132	27	#include <setjmp.h>
a0bd404e	28
3c25c5f6 NC	29	typedef struct
3c25c5f6 NC	30	{
252b5132 RH	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;
8df14d78	40	OPCODES_SIGJMP_BUF bailout;
252b5132	41
6ddfd88c	42	int tabl_index;
252b5132 RH	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;
3c25c5f6 NC	52	}
3c25c5f6 NC	53	instr_data_s;
252b5132 RH	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) \
ec22bdda	59	((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
252b5132 RH	60	? 1 : fetch_data ((info), (nibble)))
	61
	62	static int
c8fd013c	63	fetch_data (struct disassemble_info *info, int nibble)
252b5132 RH	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);
8df14d78	79	OPCODES_SIGLONGJMP (priv->bailout, 1);
252b5132 RH	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
3c25c5f6 NC	106	static char *codes[16] =
	107	{
	108	"f",
	109	"lt",
	110	"le",
	111	"ule",
	112	"ov/pe",
	113	"mi",
	114	"eq",
	115	"c/ult",
	116	"t",
	117	"ge",
	118	"gt",
	119	"ugt",
	120	"nov/po",
	121	"pl",
	122	"ne",
	123	"nc/uge"
	124	};
	125
	126	static char *ctrl_names[8] =
	127	{
	128	"<invld>",
	129	"flags",
	130	"fcw",
	131	"refresh",
	132	"psapseg",
	133	"psapoff",
	134	"nspseg",
	135	"nspoff"
	136	};
6840198f NC	137
6840198f NC	138	static int seg_length;
c8fd013c CG	139	int z8k_lookup_instr (unsigned char , disassemble_info );
	140	static void output_instr (instr_data_s , unsigned long, disassemble_info );
	141	static void unpack_instr (instr_data_s , int, disassemble_info );
	142	static void unparse_instr (instr_data_s *, int);
252b5132 RH	143
252b5132 RH	144	static int
c8fd013c	145	print_insn_z8k (bfd_vma addr, disassemble_info *info, int is_segmented)
252b5132 RH	146	{
	147	instr_data_s instr_data;
	148
	149	info->private_data = (PTR) &instr_data;
	150	instr_data.max_fetched = 0;
	151	instr_data.insn_start = addr;
8df14d78	152	if (OPCODES_SIGSETJMP (instr_data.bailout) != 0)
252b5132 RH	153	/* Error return. */
	154	return -1;
	155
3c25c5f6 NC	156	info->bytes_per_chunk = 2;
	157	info->bytes_per_line = 6;
	158	info->display_endian = BFD_ENDIAN_BIG;
	159
252b5132	160	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
6ddfd88c	161	if (instr_data.tabl_index >= 0)
252b5132 RH	162	{
252b5132 RH	163	unpack_instr (&instr_data, is_segmented, info);
6840198f	164	unparse_instr (&instr_data, is_segmented);
252b5132	165	output_instr (&instr_data, addr, info);
6840198f	166	return z8k_table[instr_data.tabl_index].length + seg_length;
252b5132 RH	167	}
	168	else
	169	{
	170	FETCH_DATA (info, 4);
	171	(*info->fprintf_func) (info->stream, ".word %02x%02x",
	172	instr_data.bytes[0], instr_data.bytes[2]);
	173	return 2;
	174	}
	175	}
	176
	177	int
c8fd013c	178	print_insn_z8001 (bfd_vma addr, disassemble_info *info)
252b5132 RH	179	{
	180	return print_insn_z8k (addr, info, 1);
	181	}
	182
	183	int
c8fd013c	184	print_insn_z8002 (bfd_vma addr, disassemble_info *info)
252b5132 RH	185	{
	186	return print_insn_z8k (addr, info, 0);
	187	}
	188
	189	int
c8fd013c	190	z8k_lookup_instr (unsigned char nibbles, disassemble_info info)
252b5132	191	{
252b5132 RH	192	int nibl_index, tabl_index;
252b5132 RH	193	int nibl_matched;
7f31df7c	194	int need_fetch = 0;
252b5132 RH	195	unsigned short instr_nibl;
	196	unsigned short tabl_datum, datum_class, datum_value;
	197
	198	nibl_matched = 0;
	199	tabl_index = 0;
7f31df7c	200	FETCH_DATA (info, 4);
252b5132 RH	201	while (!nibl_matched && z8k_table[tabl_index].name)
	202	{
	203	nibl_matched = 1;
5c90f90d KH	204	for (nibl_index = 0;
	205	nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched;
	206	nibl_index++)
252b5132 RH	207	{
252b5132 RH	208	if ((nibl_index % 4) == 0)
7f31df7c CG	209	{
	210	/* Fetch data only if it isn't already there. */
	211	if (nibl_index >= 4 \|\| (nibl_index < 4 && need_fetch))
	212	FETCH_DATA (info, nibl_index + 4); /* Fetch one word at a time. */
	213	if (nibl_index < 4)
	214	need_fetch = 0;
	215	else
	216	need_fetch = 1;
	217	}
252b5132 RH	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;
3c25c5f6 NC	230	case CLASS_IGNORE:
3c25c5f6 NC	231	break;
252b5132 RH	232	case CLASS_00II:
	233	if (!((~instr_nibl) & 0x4))
	234	nibl_matched = 0;
	235	break;
	236	case CLASS_01II:
	237	if (!(instr_nibl & 0x4))
	238	nibl_matched = 0;
	239	break;
	240	case CLASS_0CCC:
	241	if (!((~instr_nibl) & 0x8))
	242	nibl_matched = 0;
	243	break;
	244	case CLASS_1CCC:
	245	if (!(instr_nibl & 0x8))
	246	nibl_matched = 0;
	247	break;
	248	case CLASS_0DISP7:
	249	if (!((~instr_nibl) & 0x8))
	250	nibl_matched = 0;
	251	nibl_index += 1;
	252	break;
	253	case CLASS_1DISP7:
	254	if (!(instr_nibl & 0x8))
	255	nibl_matched = 0;
	256	nibl_index += 1;
	257	break;
	258	case CLASS_REGN0:
	259	if (instr_nibl == 0)
	260	nibl_matched = 0;
	261	break;
	262	case CLASS_BIT_1OR2:
	263	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	264	nibl_matched = 0;
	265	break;
	266	default:
	267	break;
	268	}
	269	}
3c25c5f6	270
252b5132	271	if (nibl_matched)
3c25c5f6	272	return tabl_index;
252b5132 RH	273
	274	tabl_index++;
	275	}
	276	return -1;
252b5132 RH	277	}
	278
	279	static void
c8fd013c CG	280	output_instr (instr_data_s *instr_data,
	281	unsigned long addr ATTRIBUTE_UNUSED,
	282	disassemble_info *info)
252b5132	283	{
3c25c5f6	284	int num_bytes;
252b5132 RH	285	char out_str[100];
252b5132 RH	286
3c25c5f6	287	out_str[0] = 0;
252b5132	288
3c25c5f6 NC	289	num_bytes = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
3c25c5f6 NC	290	FETCH_DATA (info, num_bytes);
252b5132 RH	291
	292	strcat (out_str, instr_data->instr_asmsrc);
	293
	294	(*info->fprintf_func) (info->stream, "%s", out_str);
	295	}
	296
	297	static void
c8fd013c	298	unpack_instr (instr_data_s instr_data, int is_segmented, disassemble_info info)
252b5132 RH	299	{
	300	int nibl_count, loop;
	301	unsigned short instr_nibl, instr_byte, instr_word;
	302	long instr_long;
6840198f NC	303	unsigned int tabl_datum, datum_class;
6840198f NC	304	unsigned short datum_value;
252b5132 RH	305
	306	nibl_count = 0;
	307	loop = 0;
6840198f	308	seg_length = 0;
3c25c5f6	309
252b5132 RH	310	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	311	{
	312	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	313	instr_nibl = instr_data->nibbles[nibl_count];
ec22bdda KH	314	instr_byte = instr_data->bytes[nibl_count & ~1];
ec22bdda KH	315	instr_word = instr_data->words[nibl_count & ~3];
252b5132 RH	316
	317	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	318	datum_class = tabl_datum & CLASS_MASK;
	319	datum_value = tabl_datum & ~CLASS_MASK;
	320
	321	switch (datum_class)
	322	{
252b5132 RH	323	case CLASS_DISP:
	324	switch (datum_value)
	325	{
	326	case ARG_DISP16:
7f6621cd KH	327	instr_data->displacement = instr_data->insn_start + 4
7f6621cd KH	328	+ (signed short) (instr_word & 0xffff);
252b5132 RH	329	nibl_count += 3;
	330	break;
	331	case ARG_DISP12:
7f6621cd	332	if (instr_word & 0x800)
3c25c5f6 NC	333	/* Negative 12 bit displacement. */
	334	instr_data->displacement = instr_data->insn_start + 2
	335	- (signed short) ((instr_word & 0xfff) \| 0xf000) * 2;
7f6621cd	336	else
3c25c5f6 NC	337	instr_data->displacement = instr_data->insn_start + 2
	338	- (instr_word & 0x0fff) * 2;
	339
252b5132 RH	340	nibl_count += 2;
	341	break;
	342	default:
	343	break;
	344	}
	345	break;
	346	case CLASS_IMM:
	347	switch (datum_value)
	348	{
	349	case ARG_IMM4:
	350	instr_data->immediate = instr_nibl;
	351	break;
3c25c5f6 NC	352	case ARG_NIM4:
	353	instr_data->immediate = (- instr_nibl) & 0xf;
	354	break;
252b5132	355	case ARG_NIM8:
3c25c5f6	356	instr_data->immediate = (- instr_byte) & 0xff;
252b5132 RH	357	nibl_count += 1;
	358	break;
	359	case ARG_IMM8:
	360	instr_data->immediate = instr_byte;
	361	nibl_count += 1;
	362	break;
	363	case ARG_IMM16:
	364	instr_data->immediate = instr_word;
	365	nibl_count += 3;
	366	break;
	367	case ARG_IMM32:
	368	FETCH_DATA (info, nibl_count + 8);
	369	instr_long = (instr_data->words[nibl_count] << 16)
	370	\| (instr_data->words[nibl_count + 4]);
	371	instr_data->immediate = instr_long;
	372	nibl_count += 7;
	373	break;
	374	case ARG_IMMN:
	375	instr_data->immediate = instr_nibl - 1;
	376	break;
	377	case ARG_IMM4M1:
	378	instr_data->immediate = instr_nibl + 1;
	379	break;
	380	case ARG_IMM_1:
	381	instr_data->immediate = 1;
	382	break;
	383	case ARG_IMM_2:
	384	instr_data->immediate = 2;
	385	break;
	386	case ARG_IMM2:
	387	instr_data->immediate = instr_nibl & 0x3;
	388	break;
	389	default:
	390	break;
	391	}
	392	break;
	393	case CLASS_CC:
	394	instr_data->cond_code = instr_nibl;
	395	break;
252b5132 RH	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]);
7f31df7c	404	instr_data->address = ((instr_word & 0x7f00) << 16)
7f6621cd	405	+ (instr_long & 0xffff);
252b5132	406	nibl_count += 7;
7f6621cd	407	seg_length = 2;
252b5132 RH	408	}
	409	else
	410	{
7f31df7c	411	instr_data->address = ((instr_word & 0x7f00) << 16)
7f6621cd	412	+ (instr_word & 0x00ff);
252b5132 RH	413	nibl_count += 3;
	414	}
	415	}
	416	else
	417	{
	418	instr_data->address = instr_word;
	419	nibl_count += 3;
	420	}
	421	break;
	422	case CLASS_0CCC:
252b5132	423	case CLASS_1CCC:
6840198f	424	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132 RH	425	break;
252b5132 RH	426	case CLASS_0DISP7:
7f6621cd KH	427	instr_data->displacement =
7f6621cd KH	428	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	429	nibl_count += 1;
	430	break;
	431	case CLASS_1DISP7:
7f6621cd KH	432	instr_data->displacement =
7f6621cd KH	433	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	434	nibl_count += 1;
	435	break;
	436	case CLASS_01II:
	437	instr_data->interrupts = instr_nibl & 0x3;
	438	break;
	439	case CLASS_00II:
	440	instr_data->interrupts = instr_nibl & 0x3;
	441	break;
3c25c5f6	442	case CLASS_IGNORE:
252b5132	443	case CLASS_BIT:
6840198f	444	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132	445	break;
252b5132 RH	446	case CLASS_FLAGS:
	447	instr_data->flags = instr_nibl;
	448	break;
	449	case CLASS_REG:
	450	instr_data->arg_reg[datum_value] = instr_nibl;
	451	break;
252b5132 RH	452	case CLASS_REGN0:
	453	instr_data->arg_reg[datum_value] = instr_nibl;
	454	break;
7f6621cd KH	455	case CLASS_DISP8:
	456	instr_data->displacement =
	457	instr_data->insn_start + 2 + (signed char) instr_byte * 2;
6840198f	458	nibl_count += 1;
7f6621cd	459	break;
3c25c5f6 NC	460	case CLASS_BIT_1OR2:
	461	instr_data->immediate = ((instr_nibl >> 1) & 0x1) + 1;
	462	nibl_count += 1;
	463	break;
252b5132	464	default:
7f6621cd	465	abort ();
252b5132 RH	466	break;
	467	}
	468
	469	loop += 1;
	470	nibl_count += 1;
	471	}
	472	}
	473
a0bd404e CG	474	static void
	475	print_intr(char *tmp_str, unsigned long interrupts)
	476	{
	477	int comma = 0;
	478
	479	*tmp_str = 0;
	480	if (! (interrupts & 2))
	481	{
	482	strcat (tmp_str, "vi");
	483	comma = 1;
	484	}
	485	if (! (interrupts & 1))
	486	{
	487	if (comma) strcat (tmp_str, ",");
	488	strcat (tmp_str, "nvi");
	489	}
	490	}
	491
	492	static void
	493	print_flags(char *tmp_str, unsigned long flags)
	494	{
	495	int comma = 0;
	496
	497	*tmp_str = 0;
	498	if (flags & 8)
	499	{
	500	strcat (tmp_str, "c");
	501	comma = 1;
	502	}
	503	if (flags & 4)
	504	{
	505	if (comma) strcat (tmp_str, ",");
	506	strcat (tmp_str, "z");
	507	comma = 1;
	508	}
	509	if (flags & 2)
	510	{
	511	if (comma) strcat (tmp_str, ",");
	512	strcat (tmp_str, "s");
	513	comma = 1;
	514	}
	515	if (flags & 1)
	516	{
	517	if (comma) strcat (tmp_str, ",");
	518	strcat (tmp_str, "p");
	519	}
	520	}
7f31df7c	521
252b5132	522	static void
c8fd013c	523	unparse_instr (instr_data_s *instr_data, int is_segmented)
252b5132	524	{
6840198f NC	525	unsigned short datum_value;
6840198f NC	526	unsigned int tabl_datum, datum_class;
252b5132 RH	527	int loop, loop_limit;
	528	char out_str[80], tmp_str[25];
	529
3c25c5f6	530	sprintf (out_str, "%s\t", z8k_table[instr_data->tabl_index].name);
252b5132 RH	531
	532	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	533	for (loop = 0; loop < loop_limit; loop++)
	534	{
	535	if (loop)
	536	strcat (out_str, ",");
	537
	538	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	539	datum_class = tabl_datum & CLASS_MASK;
	540	datum_value = tabl_datum & ~CLASS_MASK;
	541
	542	switch (datum_class)
	543	{
	544	case CLASS_X:
3c25c5f6 NC	545	sprintf (tmp_str, "0x%0lx(r%ld)", instr_data->address,
3c25c5f6 NC	546	instr_data->arg_reg[datum_value]);
252b5132 RH	547	strcat (out_str, tmp_str);
	548	break;
	549	case CLASS_BA:
3c25c5f6	550	if (is_segmented)
14899840	551	sprintf (tmp_str, "rr%ld(#0x%lx)", instr_data->arg_reg[datum_value],
3c25c5f6 NC	552	instr_data->immediate);
3c25c5f6 NC	553	else
14899840	554	sprintf (tmp_str, "r%ld(#0x%lx)", instr_data->arg_reg[datum_value],
3c25c5f6	555	instr_data->immediate);
252b5132 RH	556	strcat (out_str, tmp_str);
	557	break;
	558	case CLASS_BX:
3c25c5f6 NC	559	if (is_segmented)
	560	sprintf (tmp_str, "rr%ld(r%ld)", instr_data->arg_reg[datum_value],
	561	instr_data->arg_reg[ARG_RX]);
	562	else
	563	sprintf (tmp_str, "r%ld(r%ld)", instr_data->arg_reg[datum_value],
	564	instr_data->arg_reg[ARG_RX]);
252b5132 RH	565	strcat (out_str, tmp_str);
	566	break;
	567	case CLASS_DISP:
6840198f	568	sprintf (tmp_str, "0x%0lx", instr_data->displacement);
252b5132 RH	569	strcat (out_str, tmp_str);
	570	break;
	571	case CLASS_IMM:
a0bd404e CG	572	if (datum_value == ARG_IMM2) /* True with EI/DI instructions only. */
	573	{
	574	print_intr (tmp_str, instr_data->interrupts);
	575	strcat (out_str, tmp_str);
	576	break;
	577	}
252b5132 RH	578	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
	579	strcat (out_str, tmp_str);
	580	break;
	581	case CLASS_CC:
	582	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	583	strcat (out_str, tmp_str);
	584	break;
	585	case CLASS_CTRL:
6840198f	586	sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
252b5132 RH	587	strcat (out_str, tmp_str);
	588	break;
	589	case CLASS_DA:
	590	case CLASS_ADDRESS:
6840198f	591	sprintf (tmp_str, "0x%0lx", instr_data->address);
252b5132 RH	592	strcat (out_str, tmp_str);
	593	break;
	594	case CLASS_IR:
a5d2034a NC	595	if (is_segmented)
	596	sprintf (tmp_str, "@rr%ld", instr_data->arg_reg[datum_value]);
	597	else
	598	sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	599	strcat (out_str, tmp_str);
252b5132 RH	600	break;
6ddfd88c CG	601	case CLASS_IRO:
	602	sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
	603	strcat (out_str, tmp_str);
	604	break;
252b5132	605	case CLASS_FLAGS:
a0bd404e	606	print_flags(tmp_str, instr_data->flags);
252b5132 RH	607	strcat (out_str, tmp_str);
	608	break;
	609	case CLASS_REG_BYTE:
	610	if (instr_data->arg_reg[datum_value] >= 0x8)
a5d2034a NC	611	sprintf (tmp_str, "rl%ld",
a5d2034a NC	612	instr_data->arg_reg[datum_value] - 0x8);
252b5132	613	else
a5d2034a	614	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	615	strcat (out_str, tmp_str);
	616	break;
	617	case CLASS_REG_WORD:
	618	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	619	strcat (out_str, tmp_str);
	620	break;
	621	case CLASS_REG_QUAD:
	622	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
	623	strcat (out_str, tmp_str);
	624	break;
	625	case CLASS_REG_LONG:
	626	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	627	strcat (out_str, tmp_str);
	628	break;
6840198f	629	case CLASS_PR:
7f6621cd KH	630	if (is_segmented)
	631	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	632	else
	633	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
6840198f NC	634	strcat (out_str, tmp_str);
6840198f NC	635	break;
252b5132	636	default:
7f6621cd	637	abort ();
252b5132 RH	638	break;
	639	}
	640	}
	641
	642	strcpy (instr_data->instr_asmsrc, out_str);
	643	}