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

/* Disassemble z8000 code.
   Copyright (C) 1992-2020 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 "disassemble.h"
#include "libiberty.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.  */
  unsigned 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)
{
  unsigned 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_matched
	     && nibl_index < ARRAY_SIZE (z8k_table[0].byte_info)
	     && nibl_index < z8k_table[tabl_index].length * 2;
	   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)
{
  unsigned 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)
{
  unsigned 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 = ((unsigned) 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 = ((unsigned) 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.
b3adc24a	2	Copyright (C) 1992-2020 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	21	#include "sysdep.h"
88c1242d	22	#include "disassemble.h"
030a2e78	23	#include "libiberty.h"
252b5132 RH	24
	25	#define DEFINE_TABLE
	26	#include "z8k-opc.h"
c8fd013c	27
252b5132	28	#include <setjmp.h>
a0bd404e	29
3c25c5f6 NC	30	typedef struct
3c25c5f6 NC	31	{
252b5132 RH	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. */
030a2e78	39	unsigned int max_fetched;
252b5132	40	bfd_vma insn_start;
8df14d78	41	OPCODES_SIGJMP_BUF bailout;
252b5132	42
6ddfd88c	43	int tabl_index;
252b5132 RH	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;
3c25c5f6 NC	53	}
3c25c5f6 NC	54	instr_data_s;
252b5132 RH	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) \
ec22bdda	60	((nibble) < ((instr_data_s *) (info->private_data))->max_fetched \
252b5132 RH	61	? 1 : fetch_data ((info), (nibble)))
	62
	63	static int
c8fd013c	64	fetch_data (struct disassemble_info *info, int nibble)
252b5132 RH	65	{
	66	unsigned char mybuf[20];
	67	int status;
5c90f90d	68	instr_data_s priv = (instr_data_s ) info->private_data;
252b5132 RH	69
	70	if ((nibble % 4) != 0)
	71	abort ();
	72
	73	status = (*info->read_memory_func) (priv->insn_start,
	74	(bfd_byte *) mybuf,
	75	nibble / 2,
	76	info);
	77	if (status != 0)
	78	{
	79	(*info->memory_error_func) (status, priv->insn_start, info);
8df14d78	80	OPCODES_SIGLONGJMP (priv->bailout, 1);
252b5132 RH	81	}
	82
	83	{
	84	int i;
5c90f90d KH	85	unsigned char *p = mybuf;
5c90f90d KH	86
252b5132 RH	87	for (i = 0; i < nibble;)
	88	{
	89	priv->words[i] = (p[0] << 8) \| p[1];
5c90f90d	90
252b5132 RH	91	priv->bytes[i] = *p;
252b5132 RH	92	priv->nibbles[i++] = *p >> 4;
5c90f90d	93	priv->nibbles[i++] = *p & 0xf;
252b5132 RH	94
	95	++p;
	96	priv->bytes[i] = *p;
	97	priv->nibbles[i++] = *p >> 4;
	98	priv->nibbles[i++] = *p & 0xf;
	99
	100	++p;
	101	}
	102	}
	103	priv->max_fetched = nibble;
	104	return 1;
	105	}
	106
3c25c5f6 NC	107	static char *codes[16] =
	108	{
	109	"f",
	110	"lt",
	111	"le",
	112	"ule",
	113	"ov/pe",
	114	"mi",
	115	"eq",
	116	"c/ult",
	117	"t",
	118	"ge",
	119	"gt",
	120	"ugt",
	121	"nov/po",
	122	"pl",
	123	"ne",
	124	"nc/uge"
	125	};
	126
	127	static char *ctrl_names[8] =
	128	{
	129	"<invld>",
	130	"flags",
	131	"fcw",
	132	"refresh",
	133	"psapseg",
	134	"psapoff",
	135	"nspseg",
	136	"nspoff"
	137	};
6840198f NC	138
6840198f NC	139	static int seg_length;
c8fd013c CG	140	int z8k_lookup_instr (unsigned char , disassemble_info );
	141	static void output_instr (instr_data_s , unsigned long, disassemble_info );
	142	static void unpack_instr (instr_data_s , int, disassemble_info );
	143	static void unparse_instr (instr_data_s *, int);
252b5132 RH	144
252b5132 RH	145	static int
c8fd013c	146	print_insn_z8k (bfd_vma addr, disassemble_info *info, int is_segmented)
252b5132 RH	147	{
	148	instr_data_s instr_data;
	149
	150	info->private_data = (PTR) &instr_data;
	151	instr_data.max_fetched = 0;
	152	instr_data.insn_start = addr;
8df14d78	153	if (OPCODES_SIGSETJMP (instr_data.bailout) != 0)
252b5132 RH	154	/* Error return. */
	155	return -1;
	156
3c25c5f6 NC	157	info->bytes_per_chunk = 2;
	158	info->bytes_per_line = 6;
	159	info->display_endian = BFD_ENDIAN_BIG;
	160
252b5132	161	instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
6ddfd88c	162	if (instr_data.tabl_index >= 0)
252b5132 RH	163	{
252b5132 RH	164	unpack_instr (&instr_data, is_segmented, info);
6840198f	165	unparse_instr (&instr_data, is_segmented);
252b5132	166	output_instr (&instr_data, addr, info);
6840198f	167	return z8k_table[instr_data.tabl_index].length + seg_length;
252b5132 RH	168	}
	169	else
	170	{
	171	FETCH_DATA (info, 4);
	172	(*info->fprintf_func) (info->stream, ".word %02x%02x",
	173	instr_data.bytes[0], instr_data.bytes[2]);
	174	return 2;
	175	}
	176	}
	177
	178	int
c8fd013c	179	print_insn_z8001 (bfd_vma addr, disassemble_info *info)
252b5132 RH	180	{
	181	return print_insn_z8k (addr, info, 1);
	182	}
	183
	184	int
c8fd013c	185	print_insn_z8002 (bfd_vma addr, disassemble_info *info)
252b5132 RH	186	{
	187	return print_insn_z8k (addr, info, 0);
	188	}
	189
	190	int
c8fd013c	191	z8k_lookup_instr (unsigned char nibbles, disassemble_info info)
252b5132	192	{
030a2e78	193	unsigned int nibl_index, tabl_index;
252b5132	194	int nibl_matched;
7f31df7c	195	int need_fetch = 0;
252b5132 RH	196	unsigned short instr_nibl;
	197	unsigned short tabl_datum, datum_class, datum_value;
	198
	199	nibl_matched = 0;
	200	tabl_index = 0;
7f31df7c	201	FETCH_DATA (info, 4);
252b5132 RH	202	while (!nibl_matched && z8k_table[tabl_index].name)
	203	{
	204	nibl_matched = 1;
5c90f90d	205	for (nibl_index = 0;
030a2e78 AM	206	nibl_matched
	207	&& nibl_index < ARRAY_SIZE (z8k_table[0].byte_info)
	208	&& nibl_index < z8k_table[tabl_index].length * 2;
5c90f90d	209	nibl_index++)
252b5132 RH	210	{
252b5132 RH	211	if ((nibl_index % 4) == 0)
7f31df7c CG	212	{
	213	/* Fetch data only if it isn't already there. */
	214	if (nibl_index >= 4 \|\| (nibl_index < 4 && need_fetch))
	215	FETCH_DATA (info, nibl_index + 4); /* Fetch one word at a time. */
	216	if (nibl_index < 4)
	217	need_fetch = 0;
	218	else
	219	need_fetch = 1;
	220	}
252b5132 RH	221	instr_nibl = nibbles[nibl_index];
	222
	223	tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
	224	datum_class = tabl_datum & CLASS_MASK;
	225	datum_value = ~CLASS_MASK & tabl_datum;
	226
	227	switch (datum_class)
	228	{
	229	case CLASS_BIT:
	230	if (datum_value != instr_nibl)
	231	nibl_matched = 0;
	232	break;
3c25c5f6 NC	233	case CLASS_IGNORE:
3c25c5f6 NC	234	break;
252b5132 RH	235	case CLASS_00II:
	236	if (!((~instr_nibl) & 0x4))
	237	nibl_matched = 0;
	238	break;
	239	case CLASS_01II:
	240	if (!(instr_nibl & 0x4))
	241	nibl_matched = 0;
	242	break;
	243	case CLASS_0CCC:
	244	if (!((~instr_nibl) & 0x8))
	245	nibl_matched = 0;
	246	break;
	247	case CLASS_1CCC:
	248	if (!(instr_nibl & 0x8))
	249	nibl_matched = 0;
	250	break;
	251	case CLASS_0DISP7:
	252	if (!((~instr_nibl) & 0x8))
	253	nibl_matched = 0;
	254	nibl_index += 1;
	255	break;
	256	case CLASS_1DISP7:
	257	if (!(instr_nibl & 0x8))
	258	nibl_matched = 0;
	259	nibl_index += 1;
	260	break;
	261	case CLASS_REGN0:
	262	if (instr_nibl == 0)
	263	nibl_matched = 0;
	264	break;
	265	case CLASS_BIT_1OR2:
	266	if ((instr_nibl \| 0x2) != (datum_value \| 0x2))
	267	nibl_matched = 0;
	268	break;
	269	default:
	270	break;
	271	}
	272	}
3c25c5f6	273
252b5132	274	if (nibl_matched)
3c25c5f6	275	return tabl_index;
252b5132 RH	276
	277	tabl_index++;
	278	}
	279	return -1;
252b5132 RH	280	}
	281
	282	static void
c8fd013c CG	283	output_instr (instr_data_s *instr_data,
	284	unsigned long addr ATTRIBUTE_UNUSED,
	285	disassemble_info *info)
252b5132	286	{
030a2e78	287	unsigned int num_bytes;
252b5132 RH	288	char out_str[100];
252b5132 RH	289
3c25c5f6	290	out_str[0] = 0;
252b5132	291
3c25c5f6 NC	292	num_bytes = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
3c25c5f6 NC	293	FETCH_DATA (info, num_bytes);
252b5132 RH	294
	295	strcat (out_str, instr_data->instr_asmsrc);
	296
	297	(*info->fprintf_func) (info->stream, "%s", out_str);
	298	}
	299
	300	static void
c8fd013c	301	unpack_instr (instr_data_s instr_data, int is_segmented, disassemble_info info)
252b5132	302	{
030a2e78	303	unsigned int nibl_count, loop;
252b5132 RH	304	unsigned short instr_nibl, instr_byte, instr_word;
252b5132 RH	305	long instr_long;
6840198f NC	306	unsigned int tabl_datum, datum_class;
6840198f NC	307	unsigned short datum_value;
252b5132 RH	308
	309	nibl_count = 0;
	310	loop = 0;
6840198f	311	seg_length = 0;
3c25c5f6	312
252b5132 RH	313	while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
	314	{
	315	FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
	316	instr_nibl = instr_data->nibbles[nibl_count];
ec22bdda KH	317	instr_byte = instr_data->bytes[nibl_count & ~1];
ec22bdda KH	318	instr_word = instr_data->words[nibl_count & ~3];
252b5132 RH	319
	320	tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
	321	datum_class = tabl_datum & CLASS_MASK;
	322	datum_value = tabl_datum & ~CLASS_MASK;
	323
	324	switch (datum_class)
	325	{
252b5132 RH	326	case CLASS_DISP:
	327	switch (datum_value)
	328	{
	329	case ARG_DISP16:
7f6621cd KH	330	instr_data->displacement = instr_data->insn_start + 4
7f6621cd KH	331	+ (signed short) (instr_word & 0xffff);
252b5132 RH	332	nibl_count += 3;
	333	break;
	334	case ARG_DISP12:
7f6621cd	335	if (instr_word & 0x800)
3c25c5f6 NC	336	/* Negative 12 bit displacement. */
	337	instr_data->displacement = instr_data->insn_start + 2
	338	- (signed short) ((instr_word & 0xfff) \| 0xf000) * 2;
7f6621cd	339	else
3c25c5f6 NC	340	instr_data->displacement = instr_data->insn_start + 2
	341	- (instr_word & 0x0fff) * 2;
	342
252b5132 RH	343	nibl_count += 2;
	344	break;
	345	default:
	346	break;
	347	}
	348	break;
	349	case CLASS_IMM:
	350	switch (datum_value)
	351	{
	352	case ARG_IMM4:
	353	instr_data->immediate = instr_nibl;
	354	break;
3c25c5f6 NC	355	case ARG_NIM4:
	356	instr_data->immediate = (- instr_nibl) & 0xf;
	357	break;
252b5132	358	case ARG_NIM8:
3c25c5f6	359	instr_data->immediate = (- instr_byte) & 0xff;
252b5132 RH	360	nibl_count += 1;
	361	break;
	362	case ARG_IMM8:
	363	instr_data->immediate = instr_byte;
	364	nibl_count += 1;
	365	break;
	366	case ARG_IMM16:
	367	instr_data->immediate = instr_word;
	368	nibl_count += 3;
	369	break;
	370	case ARG_IMM32:
	371	FETCH_DATA (info, nibl_count + 8);
ca1eaac0 AM	372	instr_long = ((unsigned) instr_data->words[nibl_count] << 16
ca1eaac0 AM	373	\| instr_data->words[nibl_count + 4]);
252b5132 RH	374	instr_data->immediate = instr_long;
	375	nibl_count += 7;
	376	break;
	377	case ARG_IMMN:
	378	instr_data->immediate = instr_nibl - 1;
	379	break;
	380	case ARG_IMM4M1:
	381	instr_data->immediate = instr_nibl + 1;
	382	break;
	383	case ARG_IMM_1:
	384	instr_data->immediate = 1;
	385	break;
	386	case ARG_IMM_2:
	387	instr_data->immediate = 2;
	388	break;
	389	case ARG_IMM2:
	390	instr_data->immediate = instr_nibl & 0x3;
	391	break;
	392	default:
	393	break;
	394	}
	395	break;
	396	case CLASS_CC:
	397	instr_data->cond_code = instr_nibl;
	398	break;
252b5132 RH	399	case CLASS_ADDRESS:
	400	if (is_segmented)
	401	{
	402	if (instr_nibl & 0x8)
	403	{
	404	FETCH_DATA (info, nibl_count + 8);
ca1eaac0 AM	405	instr_long = ((unsigned) instr_data->words[nibl_count] << 16
	406	\| instr_data->words[nibl_count + 4]);
	407	instr_data->address = ((instr_word & 0x7f00) << 16
	408	\| (instr_long & 0xffff));
252b5132	409	nibl_count += 7;
7f6621cd	410	seg_length = 2;
252b5132 RH	411	}
	412	else
	413	{
ca1eaac0 AM	414	instr_data->address = ((instr_word & 0x7f00) << 16
ca1eaac0 AM	415	\| (instr_word & 0x00ff));
252b5132 RH	416	nibl_count += 3;
	417	}
	418	}
	419	else
	420	{
	421	instr_data->address = instr_word;
	422	nibl_count += 3;
	423	}
	424	break;
	425	case CLASS_0CCC:
252b5132	426	case CLASS_1CCC:
6840198f	427	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132 RH	428	break;
252b5132 RH	429	case CLASS_0DISP7:
7f6621cd KH	430	instr_data->displacement =
7f6621cd KH	431	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	432	nibl_count += 1;
	433	break;
	434	case CLASS_1DISP7:
7f6621cd KH	435	instr_data->displacement =
7f6621cd KH	436	instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
252b5132 RH	437	nibl_count += 1;
	438	break;
	439	case CLASS_01II:
	440	instr_data->interrupts = instr_nibl & 0x3;
	441	break;
	442	case CLASS_00II:
	443	instr_data->interrupts = instr_nibl & 0x3;
	444	break;
3c25c5f6	445	case CLASS_IGNORE:
252b5132	446	case CLASS_BIT:
6840198f	447	instr_data->ctrl_code = instr_nibl & 0x7;
252b5132	448	break;
252b5132 RH	449	case CLASS_FLAGS:
	450	instr_data->flags = instr_nibl;
	451	break;
	452	case CLASS_REG:
	453	instr_data->arg_reg[datum_value] = instr_nibl;
	454	break;
252b5132 RH	455	case CLASS_REGN0:
	456	instr_data->arg_reg[datum_value] = instr_nibl;
	457	break;
7f6621cd KH	458	case CLASS_DISP8:
	459	instr_data->displacement =
	460	instr_data->insn_start + 2 + (signed char) instr_byte * 2;
6840198f	461	nibl_count += 1;
7f6621cd	462	break;
3c25c5f6 NC	463	case CLASS_BIT_1OR2:
	464	instr_data->immediate = ((instr_nibl >> 1) & 0x1) + 1;
	465	nibl_count += 1;
	466	break;
252b5132	467	default:
7f6621cd	468	abort ();
252b5132 RH	469	break;
	470	}
	471
	472	loop += 1;
	473	nibl_count += 1;
	474	}
	475	}
	476
a0bd404e CG	477	static void
	478	print_intr(char *tmp_str, unsigned long interrupts)
	479	{
	480	int comma = 0;
	481
	482	*tmp_str = 0;
	483	if (! (interrupts & 2))
	484	{
	485	strcat (tmp_str, "vi");
	486	comma = 1;
	487	}
	488	if (! (interrupts & 1))
	489	{
	490	if (comma) strcat (tmp_str, ",");
	491	strcat (tmp_str, "nvi");
	492	}
	493	}
	494
	495	static void
	496	print_flags(char *tmp_str, unsigned long flags)
	497	{
	498	int comma = 0;
	499
	500	*tmp_str = 0;
	501	if (flags & 8)
	502	{
	503	strcat (tmp_str, "c");
	504	comma = 1;
	505	}
	506	if (flags & 4)
	507	{
	508	if (comma) strcat (tmp_str, ",");
	509	strcat (tmp_str, "z");
	510	comma = 1;
	511	}
	512	if (flags & 2)
	513	{
	514	if (comma) strcat (tmp_str, ",");
	515	strcat (tmp_str, "s");
	516	comma = 1;
	517	}
	518	if (flags & 1)
	519	{
	520	if (comma) strcat (tmp_str, ",");
	521	strcat (tmp_str, "p");
	522	}
	523	}
7f31df7c	524
252b5132	525	static void
c8fd013c	526	unparse_instr (instr_data_s *instr_data, int is_segmented)
252b5132	527	{
6840198f NC	528	unsigned short datum_value;
6840198f NC	529	unsigned int tabl_datum, datum_class;
252b5132 RH	530	int loop, loop_limit;
	531	char out_str[80], tmp_str[25];
	532
3c25c5f6	533	sprintf (out_str, "%s\t", z8k_table[instr_data->tabl_index].name);
252b5132 RH	534
	535	loop_limit = z8k_table[instr_data->tabl_index].noperands;
	536	for (loop = 0; loop < loop_limit; loop++)
	537	{
	538	if (loop)
	539	strcat (out_str, ",");
	540
	541	tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
	542	datum_class = tabl_datum & CLASS_MASK;
	543	datum_value = tabl_datum & ~CLASS_MASK;
	544
	545	switch (datum_class)
	546	{
	547	case CLASS_X:
3c25c5f6 NC	548	sprintf (tmp_str, "0x%0lx(r%ld)", instr_data->address,
3c25c5f6 NC	549	instr_data->arg_reg[datum_value]);
252b5132 RH	550	strcat (out_str, tmp_str);
	551	break;
	552	case CLASS_BA:
3c25c5f6	553	if (is_segmented)
14899840	554	sprintf (tmp_str, "rr%ld(#0x%lx)", instr_data->arg_reg[datum_value],
3c25c5f6 NC	555	instr_data->immediate);
3c25c5f6 NC	556	else
14899840	557	sprintf (tmp_str, "r%ld(#0x%lx)", instr_data->arg_reg[datum_value],
3c25c5f6	558	instr_data->immediate);
252b5132 RH	559	strcat (out_str, tmp_str);
	560	break;
	561	case CLASS_BX:
3c25c5f6 NC	562	if (is_segmented)
	563	sprintf (tmp_str, "rr%ld(r%ld)", instr_data->arg_reg[datum_value],
	564	instr_data->arg_reg[ARG_RX]);
	565	else
	566	sprintf (tmp_str, "r%ld(r%ld)", instr_data->arg_reg[datum_value],
	567	instr_data->arg_reg[ARG_RX]);
252b5132 RH	568	strcat (out_str, tmp_str);
	569	break;
	570	case CLASS_DISP:
6840198f	571	sprintf (tmp_str, "0x%0lx", instr_data->displacement);
252b5132 RH	572	strcat (out_str, tmp_str);
	573	break;
	574	case CLASS_IMM:
a0bd404e CG	575	if (datum_value == ARG_IMM2) /* True with EI/DI instructions only. */
	576	{
	577	print_intr (tmp_str, instr_data->interrupts);
	578	strcat (out_str, tmp_str);
	579	break;
	580	}
252b5132 RH	581	sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
	582	strcat (out_str, tmp_str);
	583	break;
	584	case CLASS_CC:
	585	sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
	586	strcat (out_str, tmp_str);
	587	break;
	588	case CLASS_CTRL:
6840198f	589	sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
252b5132 RH	590	strcat (out_str, tmp_str);
	591	break;
	592	case CLASS_DA:
	593	case CLASS_ADDRESS:
6840198f	594	sprintf (tmp_str, "0x%0lx", instr_data->address);
252b5132 RH	595	strcat (out_str, tmp_str);
	596	break;
	597	case CLASS_IR:
a5d2034a NC	598	if (is_segmented)
	599	sprintf (tmp_str, "@rr%ld", instr_data->arg_reg[datum_value]);
	600	else
	601	sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	602	strcat (out_str, tmp_str);
252b5132 RH	603	break;
6ddfd88c CG	604	case CLASS_IRO:
	605	sprintf (tmp_str, "@r%ld", instr_data->arg_reg[datum_value]);
	606	strcat (out_str, tmp_str);
	607	break;
252b5132	608	case CLASS_FLAGS:
a0bd404e	609	print_flags(tmp_str, instr_data->flags);
252b5132 RH	610	strcat (out_str, tmp_str);
	611	break;
	612	case CLASS_REG_BYTE:
	613	if (instr_data->arg_reg[datum_value] >= 0x8)
a5d2034a NC	614	sprintf (tmp_str, "rl%ld",
a5d2034a NC	615	instr_data->arg_reg[datum_value] - 0x8);
252b5132	616	else
a5d2034a	617	sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
252b5132 RH	618	strcat (out_str, tmp_str);
	619	break;
	620	case CLASS_REG_WORD:
	621	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
	622	strcat (out_str, tmp_str);
	623	break;
	624	case CLASS_REG_QUAD:
	625	sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
	626	strcat (out_str, tmp_str);
	627	break;
	628	case CLASS_REG_LONG:
	629	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	630	strcat (out_str, tmp_str);
	631	break;
6840198f	632	case CLASS_PR:
7f6621cd KH	633	if (is_segmented)
	634	sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
	635	else
	636	sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
6840198f NC	637	strcat (out_str, tmp_str);
6840198f NC	638	break;
252b5132	639	default:
7f6621cd	640	abort ();
252b5132 RH	641	break;
	642	}
	643	}
	644
	645	strcpy (instr_data->instr_asmsrc, out_str);
	646	}