/src/binutils-gdb/opcodes/mmix-dis.c

Source
/* mmix-dis.c -- Disassemble MMIX instructions.
   Copyright (C) 2000-2026 Free Software Foundation, Inc.
   Written by Hans-Peter Nilsson (hp@bitrange.com)

   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 <stdio.h>
#include "opcode/mmix.h"
#include "disassemble.h"
#include "libiberty.h"
#include "bfd.h"
#include "opintl.h"

#define BAD_CASE(x)           \
  do                \
   {               \
     opcodes_error_handler (_("bad case %d (%s) in %s:%d"),  \
          x, #x, __FILE__, __LINE__);    \
     abort ();              \
   }                \
 while (0)

#define FATAL_DEBUG           \
 do                \
   {               \
     opcodes_error_handler (_("internal: non-debugged code " \
            "(test-case missing): %s:%d"),  \
          __FILE__, __LINE__);    \
     abort ();              \
   }                \
 while (0)

#define ROUND_MODE(n)         \
 ((n) == 1 ? "ROUND_OFF" : (n) == 2 ? "ROUND_UP" :  \
  (n) == 3 ? "ROUND_DOWN" : (n) == 4 ? "ROUND_NEAR" :  \
  _("(unknown)"))

#define INSN_IMMEDIATE_BIT (IMM_OFFSET_BIT << 24)
#define INSN_BACKWARD_OFFSET_BIT (1 << 24)

#define MAX_REG_NAME_LEN       256
#define MAX_SPEC_REG_NAME_LEN  32
struct mmix_dis_info
 {
   const char *reg_name[MAX_REG_NAME_LEN];
   const char *spec_reg_name[MAX_SPEC_REG_NAME_LEN];

   /* Waste a little memory so we don't have to allocate each separately.
      We could have an array with static contents for these, but on the
      other hand, we don't have to.  */
   char basic_reg_name[MAX_REG_NAME_LEN][sizeof ("$255")];
 };

/* Initialize a target-specific array in INFO.  */

static bool
initialize_mmix_dis_info (struct disassemble_info *info)
{
  struct mmix_dis_info *minfop = malloc (sizeof (struct mmix_dis_info));
  long i;

  if (minfop == NULL)
    return false;

  memset (minfop, 0, sizeof (*minfop));

  /* Initialize register names from register symbols.  If there's no
     register section, then there are no register symbols.  */
  if ((info->section != NULL && info->section->owner != NULL)
      || (info->symbols != NULL
    && info->symbols[0] != NULL
    && bfd_asymbol_bfd (info->symbols[0]) != NULL))
    {
      bfd *abfd = info->section && info->section->owner != NULL
  ? info->section->owner
  : bfd_asymbol_bfd (info->symbols[0]);
      asection *reg_section = bfd_get_section_by_name (abfd, "*REG*");

      if (reg_section != NULL)
  {
    /* The returned symcount *does* include the ending NULL.  */
    long symsize = bfd_get_symtab_upper_bound (abfd);
    asymbol **syms = malloc (symsize);
    long nsyms;

    if (syms == NULL)
      {
        FATAL_DEBUG;
        free (minfop);
        return false;
      }
    nsyms = bfd_canonicalize_symtab (abfd, syms);

    /* We use the first name for a register.  If this is MMO, then
       it's the name with the first sequence number, presumably the
       first in the source.  */
    for (i = 0; i < nsyms && syms[i] != NULL; i++)
      {
        if (syms[i]->section == reg_section
      && syms[i]->value < MAX_REG_NAME_LEN
      && minfop->reg_name[syms[i]->value] == NULL)
    minfop->reg_name[syms[i]->value] = syms[i]->name;
      }
    free (syms);
  }
    }

  /* Fill in the rest with the canonical names.  */
  for (i = 0; i < MAX_REG_NAME_LEN; i++)
    if (minfop->reg_name[i] == NULL)
      {
  sprintf (minfop->basic_reg_name[i], "$%ld", i);
  minfop->reg_name[i] = minfop->basic_reg_name[i];
      }

  /* We assume it's actually a one-to-one mapping of number-to-name.  */
  for (i = 0; mmix_spec_regs[i].name != NULL; i++)
    minfop->spec_reg_name[mmix_spec_regs[i].number] = mmix_spec_regs[i].name;

  info->private_data = (void *) minfop;
  return true;
}

/* A table indexed by the first byte is constructed as we disassemble each
   tetrabyte.  The contents is a pointer into mmix_insns reflecting the
   first found entry with matching match-bits and lose-bits.  Further
   entries are considered one after one until the operand constraints
   match or the match-bits and lose-bits do not match.  Normally a
   "further entry" will just show that there was no other match.  */

static const struct mmix_opcode *
get_opcode (unsigned long insn)
{
  static const struct mmix_opcode **opcodes = NULL;
  const struct mmix_opcode *opcodep = mmix_opcodes;
  unsigned int opcode_part = (insn >> 24) & 255;

  if (opcodes == NULL)
    opcodes = xcalloc (256, sizeof (struct mmix_opcode *));

  opcodep = opcodes[opcode_part];
  if (opcodep == NULL
      || (opcodep->match & insn) != opcodep->match
      || (opcodep->lose & insn) != 0)
    {
      /* Search through the table.  */
      for (opcodep = mmix_opcodes; opcodep->name != NULL; opcodep++)
  {
    /* FIXME: Break out this into an initialization function.  */
    if ((opcodep->match & (opcode_part << 24)) == opcode_part
        && (opcodep->lose & (opcode_part << 24)) == 0)
      opcodes[opcode_part] = opcodep;

    if ((opcodep->match & insn) == opcodep->match
        && (opcodep->lose & insn) == 0)
      break;
  }
    }

  if (opcodep->name == NULL)
    return NULL;

  /* Check constraints.  If they don't match, loop through the next opcode
     entries.  */
  do
    {
      switch (opcodep->operands)
  {
    /* These have no restraint on what can be in the lower three
       bytes.  */
  case mmix_operands_regs:
  case mmix_operands_reg_yz:
  case mmix_operands_regs_z_opt:
  case mmix_operands_regs_z:
  case mmix_operands_jmp:
  case mmix_operands_pushgo:
  case mmix_operands_pop:
  case mmix_operands_sync:
  case mmix_operands_x_regs_z:
  case mmix_operands_neg:
  case mmix_operands_pushj:
  case mmix_operands_regaddr:
  case mmix_operands_get:
  case mmix_operands_set:
  case mmix_operands_save:
  case mmix_operands_unsave:
  case mmix_operands_xyz_opt:
    return opcodep;

    /* For a ROUND_MODE, the middle byte must be 0..4.  */
  case mmix_operands_roundregs_z:
  case mmix_operands_roundregs:
    {
      int midbyte = (insn >> 8) & 255;

      if (midbyte <= 4)
        return opcodep;
    }
  break;

  case mmix_operands_put:
    /* A "PUT".  If it is "immediate", then no restrictions,
       otherwise we have to make sure the register number is < 32.  */
    if ((insn & INSN_IMMEDIATE_BIT)
        || ((insn >> 16) & 255) < 32)
      return opcodep;
    break;

  case mmix_operands_resume:
    /* Middle bytes must be zero.  */
    if ((insn & 0x00ffff00) == 0)
      return opcodep;
    break;

  default:
    BAD_CASE (opcodep->operands);
  }

      opcodep++;
    }
  while ((opcodep->match & insn) == opcodep->match
   && (opcodep->lose & insn) == 0);

  /* If we got here, we had no match.  */
  return NULL;
}

static inline const char *
get_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
{
  if (x >= MAX_REG_NAME_LEN)
    return _("*illegal*");
  return minfop->reg_name[x];
}

static inline const char *
get_spec_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
{
  if (x >= MAX_SPEC_REG_NAME_LEN)
    return _("*illegal*");
  return minfop->spec_reg_name[x];
}

/* The main disassembly function.  */

int
print_insn_mmix (bfd_vma memaddr, struct disassemble_info *info)
{
  unsigned char buffer[4];
  unsigned long insn;
  unsigned int x, y, z;
  const struct mmix_opcode *opcodep;
  int status = (*info->read_memory_func) (memaddr, buffer, 4, info);
  struct mmix_dis_info *minfop;

  if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return -1;
    }

  /* FIXME: Is -1 suitable?  */
  if (info->private_data == NULL
      && ! initialize_mmix_dis_info (info))
    return -1;

  minfop = (struct mmix_dis_info *) info->private_data;
  x = buffer[1];
  y = buffer[2];
  z = buffer[3];

  insn = bfd_getb32 (buffer);

  opcodep = get_opcode (insn);

  if (opcodep == NULL)
    {
      (*info->fprintf_func) (info->stream, _("*unknown*"));
      return 4;
    }

  (*info->fprintf_func) (info->stream, "%s ", opcodep->name);

  /* Present bytes in the order they are laid out in memory.  */
  info->display_endian = BFD_ENDIAN_BIG;

  info->insn_info_valid = 1;
  info->bytes_per_chunk = 4;
  info->branch_delay_insns = 0;
  info->target = 0;
  switch (opcodep->type)
    {
    case mmix_type_normal:
    case mmix_type_memaccess_block:
      info->insn_type = dis_nonbranch;
      break;

    case mmix_type_branch:
      info->insn_type = dis_branch;
      break;

    case mmix_type_condbranch:
      info->insn_type = dis_condbranch;
      break;

    case mmix_type_memaccess_octa:
      info->insn_type = dis_dref;
      info->data_size = 8;
      break;

    case mmix_type_memaccess_tetra:
      info->insn_type = dis_dref;
      info->data_size = 4;
      break;

    case mmix_type_memaccess_wyde:
      info->insn_type = dis_dref;
      info->data_size = 2;
      break;

    case mmix_type_memaccess_byte:
      info->insn_type = dis_dref;
      info->data_size = 1;
      break;

    case mmix_type_jsr:
      info->insn_type = dis_jsr;
      break;

    default:
      BAD_CASE(opcodep->type);
    }

  switch (opcodep->operands)
    {
    case mmix_operands_regs:
      /*  All registers: "$X,$Y,$Z".  */
      (*info->fprintf_func) (info->stream, "%s,%s,%s",
           get_reg_name (minfop, x),
           get_reg_name (minfop, y),
           get_reg_name (minfop, z));
      break;

    case mmix_operands_reg_yz:
      /* Like SETH - "$X,YZ".  */
      (*info->fprintf_func) (info->stream, "%s,0x%x",
           get_reg_name (minfop, x), y * 256 + z);
      break;

    case mmix_operands_regs_z_opt:
    case mmix_operands_regs_z:
    case mmix_operands_pushgo:
      /* The regular "$X,$Y,$Z|Z".  */
      if (insn & INSN_IMMEDIATE_BIT)
  (*info->fprintf_func) (info->stream, "%s,%s,%d",
             get_reg_name (minfop, x),
             get_reg_name (minfop, y), z);
      else
  (*info->fprintf_func) (info->stream, "%s,%s,%s",
             get_reg_name (minfop, x),
             get_reg_name (minfop, y),
             get_reg_name (minfop, z));
      break;

    case mmix_operands_jmp:
      /* Address; only JMP.  */
      {
  bfd_signed_vma offset = (x * 65536 + y * 256 + z) * 4;

  if (insn & INSN_BACKWARD_OFFSET_BIT)
    offset -= (256 * 65536) * 4;

  info->target = memaddr + offset;
  (*info->print_address_func) (memaddr + offset, info);
      }
      break;

    case mmix_operands_roundregs_z:
      /* Two registers, like FLOT, possibly with rounding: "$X,$Z|Z"
   "$X,ROUND_MODE,$Z|Z".  */
      if (y != 0)
  {
    if (insn & INSN_IMMEDIATE_BIT)
      (*info->fprintf_func) (info->stream, "%s,%s,%d",
           get_reg_name (minfop, x),
           ROUND_MODE (y), z);
    else
      (*info->fprintf_func) (info->stream, "%s,%s,%s",
           get_reg_name (minfop, x),
           ROUND_MODE (y),
           get_reg_name (minfop, z));
  }
      else
  {
    if (insn & INSN_IMMEDIATE_BIT)
      (*info->fprintf_func) (info->stream, "%s,%d",
           get_reg_name (minfop, x), z);
    else
      (*info->fprintf_func) (info->stream, "%s,%s",
           get_reg_name (minfop, x),
           get_reg_name (minfop, z));
  }
      break;

    case mmix_operands_pop:
      /* Like POP - "X,YZ".  */
      (*info->fprintf_func) (info->stream, "%d,%d", x, y*256 + z);
      break;

    case mmix_operands_roundregs:
      /* Two registers, possibly with rounding: "$X,$Z" or
   "$X,ROUND_MODE,$Z".  */
      if (y != 0)
  (*info->fprintf_func) (info->stream, "%s,%s,%s",
             get_reg_name (minfop, x),
             ROUND_MODE (y),
             get_reg_name (minfop, z));
      else
  (*info->fprintf_func) (info->stream, "%s,%s",
             get_reg_name (minfop, x),
             get_reg_name (minfop, z));
      break;

    case mmix_operands_sync:
  /* Like SYNC - "XYZ".  */
      (*info->fprintf_func) (info->stream, "%u",
           x * 65536 + y * 256 + z);
      break;

    case mmix_operands_x_regs_z:
      /* Like SYNCD - "X,$Y,$Z|Z".  */
      if (insn & INSN_IMMEDIATE_BIT)
  (*info->fprintf_func) (info->stream, "%d,%s,%d",
             x, get_reg_name (minfop, y), z);
      else
  (*info->fprintf_func) (info->stream, "%d,%s,%s",
             x, get_reg_name (minfop, y),
             get_reg_name (minfop, z));
      break;

    case mmix_operands_neg:
      /* Like NEG and NEGU - "$X,Y,$Z|Z".  */
      if (insn & INSN_IMMEDIATE_BIT)
  (*info->fprintf_func) (info->stream, "%s,%d,%d",
             get_reg_name (minfop, x), y, z);
      else
  (*info->fprintf_func) (info->stream, "%s,%d,%s",
             get_reg_name (minfop, x), y,
             get_reg_name (minfop, z));
      break;

    case mmix_operands_pushj:
    case mmix_operands_regaddr:
      /* Like GETA or branches - "$X,Address".  */
      {
  bfd_signed_vma offset = (y * 256 + z) * 4;

  if (insn & INSN_BACKWARD_OFFSET_BIT)
    offset -= 65536 * 4;

  info->target = memaddr + offset;

  (*info->fprintf_func) (info->stream, "%s,", get_reg_name (minfop, x));
  (*info->print_address_func) (memaddr + offset, info);
      }
      break;

    case mmix_operands_get:
      /* GET - "X,spec_reg".  */
      (*info->fprintf_func) (info->stream, "%s,%s",
           get_reg_name (minfop, x),
           get_spec_reg_name (minfop, z));
      break;

    case mmix_operands_put:
      /* PUT - "spec_reg,$Z|Z".  */
      if (insn & INSN_IMMEDIATE_BIT)
  (*info->fprintf_func) (info->stream, "%s,%d",
             get_spec_reg_name (minfop, x), z);
      else
  (*info->fprintf_func) (info->stream, "%s,%s",
             get_spec_reg_name (minfop, x),
             get_reg_name (minfop, z));
      break;

    case mmix_operands_set:
      /*  Two registers, "$X,$Y".  */
      (*info->fprintf_func) (info->stream, "%s,%s",
           get_reg_name (minfop, x),
           get_reg_name (minfop, y));
      break;

    case mmix_operands_save:
      /* SAVE - "$X,0".  */
      (*info->fprintf_func) (info->stream, "%s,0", minfop->reg_name[x]);
      break;

    case mmix_operands_unsave:
      /* UNSAVE - "0,$Z".  */
      (*info->fprintf_func) (info->stream, "0,%s", minfop->reg_name[z]);
      break;

    case mmix_operands_xyz_opt:
      /* Like SWYM or TRAP - "X,Y,Z".  */
      (*info->fprintf_func) (info->stream, "%d,%d,%d", x, y, z);
      break;

    case mmix_operands_resume:
      /* Just "Z", like RESUME.  */
      (*info->fprintf_func) (info->stream, "%d", z);
      break;

    default:
      (*info->fprintf_func) (info->stream, _("*unknown operands type: %d*"),
           opcodep->operands);
      break;
    }

  return 4;
}

Coverage Report

Created: 2026-05-11 07:54

Line	Count	Source
1		/* mmix-dis.c -- Disassemble MMIX instructions.
2		Copyright (C) 2000-2026 Free Software Foundation, Inc.
3		Written by Hans-Peter Nilsson (hp@bitrange.com)
4
5		This file is part of the GNU opcodes library.
6
7		This library is free software; you can redistribute it and/or modify
8		it under the terms of the GNU General Public License as published by
9		the Free Software Foundation; either version 3, or (at your option)
10		any later version.
11
12		It is distributed in the hope that it will be useful, but WITHOUT
13		ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14		or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15		License for more details.
16
17		You should have received a copy of the GNU General Public License
18		along with this file; see the file COPYING. If not, write to the Free
19		Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
20		MA 02110-1301, USA. */
21
22		#include "sysdep.h"
23		#include <stdio.h>
24		#include "opcode/mmix.h"
25		#include "disassemble.h"
26		#include "libiberty.h"
27		#include "bfd.h"
28		#include "opintl.h"
29
30		#define BAD_CASE(x) \
31	0	do \
32	0	{ \
33	0	opcodes_error_handler (_("bad case %d (%s) in %s:%d"), \
34	0	x, #x, __FILE__, __LINE__); \
35	0	abort (); \
36	0	} \
37	0	while (0)
38
39		#define FATAL_DEBUG \
40	0	do \
41	0	{ \
42	0	opcodes_error_handler (_("internal: non-debugged code " \
43	0	"(test-case missing): %s:%d"), \
44	0	__FILE__, __LINE__); \
45	0	abort (); \
46	0	} \
47	0	while (0)
48
49		#define ROUND_MODE(n) \
50	1.21k	((n) == 1 ? "ROUND_OFF" : (n) == 2 ? "ROUND_UP" : \
51	934	(n) == 3 ? "ROUND_DOWN" : (n) == 4 ? "ROUND_NEAR" : \
52	255	_("(unknown)"))
53
54	50.6k	#define INSN_IMMEDIATE_BIT (IMM_OFFSET_BIT << 24)
55	11.3k	#define INSN_BACKWARD_OFFSET_BIT (1 << 24)
56
57	224k	#define MAX_REG_NAME_LEN 256
58	541	#define MAX_SPEC_REG_NAME_LEN 32
59		struct mmix_dis_info
60		{
61		const char *reg_name[MAX_REG_NAME_LEN];
62		const char *spec_reg_name[MAX_SPEC_REG_NAME_LEN];
63
64		/* Waste a little memory so we don't have to allocate each separately.
65		We could have an array with static contents for these, but on the
66		other hand, we don't have to. */
67		char basic_reg_name[MAX_REG_NAME_LEN][sizeof ("$255")];
68		};
69
70		/* Initialize a target-specific array in INFO. */
71
72		static bool
73		initialize_mmix_dis_info (struct disassemble_info *info)
74	199	{
75	199	struct mmix_dis_info *minfop = malloc (sizeof (struct mmix_dis_info));
76	199	long i;
77
78	199	if (minfop == NULL)
79	0	return false;
80
81	199	memset (minfop, 0, sizeof (*minfop));
82
83		/* Initialize register names from register symbols. If there's no
84		register section, then there are no register symbols. */
85	199	if ((info->section != NULL && info->section->owner != NULL)
86	178	\|\| (info->symbols != NULL
87	0	&& info->symbols[0] != NULL
88	0	&& bfd_asymbol_bfd (info->symbols[0]) != NULL))
89	21	{
90	21	bfd *abfd = info->section && info->section->owner != NULL
91	21	? info->section->owner
92	21	: bfd_asymbol_bfd (info->symbols[0]);
93	21	asection reg_section = bfd_get_section_by_name (abfd, "REG*");
94
95	21	if (reg_section != NULL)
96	15	{
97		/* The returned symcount does include the ending NULL. */
98	15	long symsize = bfd_get_symtab_upper_bound (abfd);
99	15	asymbol **syms = malloc (symsize);
100	15	long nsyms;
101
102	15	if (syms == NULL)
103	0	{
104	0	FATAL_DEBUG;
105	0	free (minfop);
106	0	return false;
107	0	}
108	15	nsyms = bfd_canonicalize_symtab (abfd, syms);
109
110		/* We use the first name for a register. If this is MMO, then
111		it's the name with the first sequence number, presumably the
112		first in the source. */
113	1.17k	for (i = 0; i < nsyms && syms[i] != NULL; i++)
114	1.16k	{
115	1.16k	if (syms[i]->section == reg_section
116	263	&& syms[i]->value < MAX_REG_NAME_LEN
117	263	&& minfop->reg_name[syms[i]->value] == NULL)
118	51	minfop->reg_name[syms[i]->value] = syms[i]->name;
119	1.16k	}
120	15	free (syms);
121	15	}
122	21	}
123
124		/* Fill in the rest with the canonical names. */
125	51.1k	for (i = 0; i < MAX_REG_NAME_LEN; i++)
126	50.9k	if (minfop->reg_name[i] == NULL)
127	50.8k	{
128	50.8k	sprintf (minfop->basic_reg_name[i], "$%ld", i);
129	50.8k	minfop->reg_name[i] = minfop->basic_reg_name[i];
130	50.8k	}
131
132		/* We assume it's actually a one-to-one mapping of number-to-name. */
133	6.56k	for (i = 0; mmix_spec_regs[i].name != NULL; i++)
134	6.36k	minfop->spec_reg_name[mmix_spec_regs[i].number] = mmix_spec_regs[i].name;
135
136	199	info->private_data = (void *) minfop;
137	199	return true;
138	199	}
139
140		/* A table indexed by the first byte is constructed as we disassemble each
141		tetrabyte. The contents is a pointer into mmix_insns reflecting the
142		first found entry with matching match-bits and lose-bits. Further
143		entries are considered one after one until the operand constraints
144		match or the match-bits and lose-bits do not match. Normally a
145		"further entry" will just show that there was no other match. */
146
147		static const struct mmix_opcode *
148		get_opcode (unsigned long insn)
149	125k	{
150	125k	static const struct mmix_opcode **opcodes = NULL;
151	125k	const struct mmix_opcode *opcodep = mmix_opcodes;
152	125k	unsigned int opcode_part = (insn >> 24) & 255;
153
154	125k	if (opcodes == NULL)
155	2	opcodes = xcalloc (256, sizeof (struct mmix_opcode *));
156
157	125k	opcodep = opcodes[opcode_part];
158	125k	if (opcodep == NULL
159	26.9k	\|\| (opcodep->match & insn) != opcodep->match
160	26.9k	\|\| (opcodep->lose & insn) != 0)
161	98.1k	{
162		/* Search through the table. */
163	7.41M	for (opcodep = mmix_opcodes; opcodep->name != NULL; opcodep++)
164	7.41M	{
165		/* FIXME: Break out this into an initialization function. */
166	7.41M	if ((opcodep->match & (opcode_part << 24)) == opcode_part
167	2	&& (opcodep->lose & (opcode_part << 24)) == 0)
168	2	opcodes[opcode_part] = opcodep;
169
170	7.41M	if ((opcodep->match & insn) == opcodep->match
171	3.23M	&& (opcodep->lose & insn) == 0)
172	94.8k	break;
173	7.41M	}
174	98.1k	}
175
176	125k	if (opcodep->name == NULL)
177	3.35k	return NULL;
178
179		/* Check constraints. If they don't match, loop through the next opcode
180		entries. */
181	121k	do
182	121k	{
183	121k	switch (opcodep->operands)
184	121k	{
185		/* These have no restraint on what can be in the lower three
186		bytes. */
187	10.9k	case mmix_operands_regs:
188	14.1k	case mmix_operands_reg_yz:
189	25.6k	case mmix_operands_regs_z_opt:
190	58.0k	case mmix_operands_regs_z:
191	58.9k	case mmix_operands_jmp:
192	59.5k	case mmix_operands_pushgo:
193	60.1k	case mmix_operands_pop:
194	60.8k	case mmix_operands_sync:
195	63.6k	case mmix_operands_x_regs_z:
196	65.1k	case mmix_operands_neg:
197	66.1k	case mmix_operands_pushj:
198	75.5k	case mmix_operands_regaddr:
199	75.8k	case mmix_operands_get:
200	76.0k	case mmix_operands_set:
201	76.3k	case mmix_operands_save:
202	76.3k	case mmix_operands_unsave:
203	114k	case mmix_operands_xyz_opt:
204	114k	return opcodep;
205
206		/* For a ROUND_MODE, the middle byte must be 0..4. */
207	4.46k	case mmix_operands_roundregs_z:
208	6.68k	case mmix_operands_roundregs:
209	6.68k	{
210	6.68k	int midbyte = (insn >> 8) & 255;
211
212	6.68k	if (midbyte <= 4)
213	2.42k	return opcodep;
214	6.68k	}
215	4.25k	break;
216
217	4.25k	case mmix_operands_put:
218		/* A "PUT". If it is "immediate", then no restrictions,
219		otherwise we have to make sure the register number is < 32. */
220	311	if ((insn & INSN_IMMEDIATE_BIT)
221	151	\|\| ((insn >> 16) & 255) < 32)
222	257	return opcodep;
223	54	break;
224
225	113	case mmix_operands_resume:
226		/* Middle bytes must be zero. */
227	113	if ((insn & 0x00ffff00) == 0)
228	113	return opcodep;
229	0	break;
230
231	0	default:
232	0	BAD_CASE (opcodep->operands);
233	121k	}
234
235	4.31k	opcodep++;
236	4.31k	}
237	121k	while ((opcodep->match & insn) == opcodep->match
238	0	&& (opcodep->lose & insn) == 0);
239
240		/* If we got here, we had no match. */
241	4.31k	return NULL;
242	121k	}
243
244		static inline const char *
245		get_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
246	172k	{
247	172k	if (x >= MAX_REG_NAME_LEN)
248	0	return _("illegal");
249	172k	return minfop->reg_name[x];
250	172k	}
251
252		static inline const char *
253		get_spec_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
254	541	{
255	541	if (x >= MAX_SPEC_REG_NAME_LEN)
256	54	return _("illegal");
257	487	return minfop->spec_reg_name[x];
258	541	}
259
260		/* The main disassembly function. */
261
262		int
263		print_insn_mmix (bfd_vma memaddr, struct disassemble_info *info)
264	125k	{
265	125k	unsigned char buffer[4];
266	125k	unsigned long insn;
267	125k	unsigned int x, y, z;
268	125k	const struct mmix_opcode *opcodep;
269	125k	int status = (*info->read_memory_func) (memaddr, buffer, 4, info);
270	125k	struct mmix_dis_info *minfop;
271
272	125k	if (status != 0)
273	134	{
274	134	(*info->memory_error_func) (status, memaddr, info);
275	134	return -1;
276	134	}
277
278		/* FIXME: Is -1 suitable? */
279	125k	if (info->private_data == NULL
280	199	&& ! initialize_mmix_dis_info (info))
281	0	return -1;
282
283	125k	minfop = (struct mmix_dis_info *) info->private_data;
284	125k	x = buffer[1];
285	125k	y = buffer[2];
286	125k	z = buffer[3];
287
288	125k	insn = bfd_getb32 (buffer);
289
290	125k	opcodep = get_opcode (insn);
291
292	125k	if (opcodep == NULL)
293	7.66k	{
294	7.66k	(info->fprintf_func) (info->stream, _("unknown*"));
295	7.66k	return 4;
296	7.66k	}
297
298	117k	(*info->fprintf_func) (info->stream, "%s ", opcodep->name);
299
300		/* Present bytes in the order they are laid out in memory. */
301	117k	info->display_endian = BFD_ENDIAN_BIG;
302
303	117k	info->insn_info_valid = 1;
304	117k	info->bytes_per_chunk = 4;
305	117k	info->branch_delay_insns = 0;
306	117k	info->target = 0;
307	117k	switch (opcodep->type)
308	117k	{
309	53.8k	case mmix_type_normal:
310	56.0k	case mmix_type_memaccess_block:
311	56.0k	info->insn_type = dis_nonbranch;
312	56.0k	break;
313
314	1.69k	case mmix_type_branch:
315	1.69k	info->insn_type = dis_branch;
316	1.69k	break;
317
318	9.18k	case mmix_type_condbranch:
319	9.18k	info->insn_type = dis_condbranch;
320	9.18k	break;
321
322	3.26k	case mmix_type_memaccess_octa:
323	3.26k	info->insn_type = dis_dref;
324	3.26k	info->data_size = 8;
325	3.26k	break;
326
327	3.00k	case mmix_type_memaccess_tetra:
328	3.00k	info->insn_type = dis_dref;
329	3.00k	info->data_size = 4;
330	3.00k	break;
331
332	1.54k	case mmix_type_memaccess_wyde:
333	1.54k	info->insn_type = dis_dref;
334	1.54k	info->data_size = 2;
335	1.54k	break;
336
337	3.59k	case mmix_type_memaccess_byte:
338	3.59k	info->insn_type = dis_dref;
339	3.59k	info->data_size = 1;
340	3.59k	break;
341
342	39.1k	case mmix_type_jsr:
343	39.1k	info->insn_type = dis_jsr;
344	39.1k	break;
345
346	0	default:
347	0	BAD_CASE(opcodep->type);
348	117k	}
349
350	117k	switch (opcodep->operands)
351	117k	{
352	10.9k	case mmix_operands_regs:
353		/* All registers: "$X,$Y,$Z". */
354	10.9k	(*info->fprintf_func) (info->stream, "%s,%s,%s",
355	10.9k	get_reg_name (minfop, x),
356	10.9k	get_reg_name (minfop, y),
357	10.9k	get_reg_name (minfop, z));
358	10.9k	break;
359
360	3.22k	case mmix_operands_reg_yz:
361		/* Like SETH - "$X,YZ". */
362	3.22k	(*info->fprintf_func) (info->stream, "%s,0x%x",
363	3.22k	get_reg_name (minfop, x), y * 256 + z);
364	3.22k	break;
365
366	11.5k	case mmix_operands_regs_z_opt:
367	43.8k	case mmix_operands_regs_z:
368	44.5k	case mmix_operands_pushgo:
369		/* The regular "$X,$Y,$Z\|Z". */
370	44.5k	if (insn & INSN_IMMEDIATE_BIT)
371	19.3k	(*info->fprintf_func) (info->stream, "%s,%s,%d",
372	19.3k	get_reg_name (minfop, x),
373	19.3k	get_reg_name (minfop, y), z);
374	25.1k	else
375	25.1k	(*info->fprintf_func) (info->stream, "%s,%s,%s",
376	25.1k	get_reg_name (minfop, x),
377	25.1k	get_reg_name (minfop, y),
378	25.1k	get_reg_name (minfop, z));
379	44.5k	break;
380
381	904	case mmix_operands_jmp:
382		/* Address; only JMP. */
383	904	{
384	904	bfd_signed_vma offset = (x * 65536 + y * 256 + z) * 4;
385
386	904	if (insn & INSN_BACKWARD_OFFSET_BIT)
387	290	offset -= (256 * 65536) * 4;
388
389	904	info->target = memaddr + offset;
390	904	(*info->print_address_func) (memaddr + offset, info);
391	904	}
392	904	break;
393
394	1.35k	case mmix_operands_roundregs_z:
395		/* Two registers, like FLOT, possibly with rounding: "$X,$Z\|Z"
396		"$X,ROUND_MODE,$Z\|Z". */
397	1.35k	if (y != 0)
398	496	{
399	496	if (insn & INSN_IMMEDIATE_BIT)
400	258	(*info->fprintf_func) (info->stream, "%s,%s,%d",
401	258	get_reg_name (minfop, x),
402	258	ROUND_MODE (y), z);
403	238	else
404	238	(*info->fprintf_func) (info->stream, "%s,%s,%s",
405	238	get_reg_name (minfop, x),
406	238	ROUND_MODE (y),
407	238	get_reg_name (minfop, z));
408	496	}
409	858	else
410	858	{
411	858	if (insn & INSN_IMMEDIATE_BIT)
412	604	(*info->fprintf_func) (info->stream, "%s,%d",
413	604	get_reg_name (minfop, x), z);
414	254	else
415	254	(*info->fprintf_func) (info->stream, "%s,%s",
416	254	get_reg_name (minfop, x),
417	254	get_reg_name (minfop, z));
418	858	}
419	1.35k	break;
420
421	519	case mmix_operands_pop:
422		/* Like POP - "X,YZ". */
423	519	(info->fprintf_func) (info->stream, "%d,%d", x, y256 + z);
424	519	break;
425
426	1.07k	case mmix_operands_roundregs:
427		/* Two registers, possibly with rounding: "$X,$Z" or
428		"$X,ROUND_MODE,$Z". */
429	1.07k	if (y != 0)
430	722	(*info->fprintf_func) (info->stream, "%s,%s,%s",
431	722	get_reg_name (minfop, x),
432	722	ROUND_MODE (y),
433	722	get_reg_name (minfop, z));
434	349	else
435	349	(*info->fprintf_func) (info->stream, "%s,%s",
436	349	get_reg_name (minfop, x),
437	349	get_reg_name (minfop, z));
438	1.07k	break;
439
440	791	case mmix_operands_sync:
441		/* Like SYNC - "XYZ". */
442	791	(*info->fprintf_func) (info->stream, "%u",
443	791	x * 65536 + y * 256 + z);
444	791	break;
445
446	2.74k	case mmix_operands_x_regs_z:
447		/* Like SYNCD - "X,$Y,$Z\|Z". */
448	2.74k	if (insn & INSN_IMMEDIATE_BIT)
449	1.20k	(*info->fprintf_func) (info->stream, "%d,%s,%d",
450	1.20k	x, get_reg_name (minfop, y), z);
451	1.53k	else
452	1.53k	(*info->fprintf_func) (info->stream, "%d,%s,%s",
453	1.53k	x, get_reg_name (minfop, y),
454	1.53k	get_reg_name (minfop, z));
455	2.74k	break;
456
457	1.48k	case mmix_operands_neg:
458		/* Like NEG and NEGU - "$X,Y,$Z\|Z". */
459	1.48k	if (insn & INSN_IMMEDIATE_BIT)
460	635	(*info->fprintf_func) (info->stream, "%s,%d,%d",
461	635	get_reg_name (minfop, x), y, z);
462	847	else
463	847	(*info->fprintf_func) (info->stream, "%s,%d,%s",
464	847	get_reg_name (minfop, x), y,
465	847	get_reg_name (minfop, z));
466	1.48k	break;
467
468	1.06k	case mmix_operands_pushj:
469	10.4k	case mmix_operands_regaddr:
470		/* Like GETA or branches - "$X,Address". */
471	10.4k	{
472	10.4k	bfd_signed_vma offset = (y * 256 + z) * 4;
473
474	10.4k	if (insn & INSN_BACKWARD_OFFSET_BIT)
475	5.27k	offset -= 65536 * 4;
476
477	10.4k	info->target = memaddr + offset;
478
479	10.4k	(*info->fprintf_func) (info->stream, "%s,", get_reg_name (minfop, x));
480	10.4k	(*info->print_address_func) (memaddr + offset, info);
481	10.4k	}
482	10.4k	break;
483
484	284	case mmix_operands_get:
485		/* GET - "X,spec_reg". */
486	284	(*info->fprintf_func) (info->stream, "%s,%s",
487	284	get_reg_name (minfop, x),
488	284	get_spec_reg_name (minfop, z));
489	284	break;
490
491	257	case mmix_operands_put:
492		/* PUT - "spec_reg,$Z\|Z". */
493	257	if (insn & INSN_IMMEDIATE_BIT)
494	160	(*info->fprintf_func) (info->stream, "%s,%d",
495	160	get_spec_reg_name (minfop, x), z);
496	97	else
497	97	(*info->fprintf_func) (info->stream, "%s,%s",
498	97	get_spec_reg_name (minfop, x),
499	97	get_reg_name (minfop, z));
500	257	break;
501
502	180	case mmix_operands_set:
503		/* Two registers, "$X,$Y". */
504	180	(*info->fprintf_func) (info->stream, "%s,%s",
505	180	get_reg_name (minfop, x),
506	180	get_reg_name (minfop, y));
507	180	break;
508
509	310	case mmix_operands_save:
510		/* SAVE - "$X,0". */
511	310	(*info->fprintf_func) (info->stream, "%s,0", minfop->reg_name[x]);
512	310	break;
513
514	29	case mmix_operands_unsave:
515		/* UNSAVE - "0,$Z". */
516	29	(*info->fprintf_func) (info->stream, "0,%s", minfop->reg_name[z]);
517	29	break;
518
519	38.3k	case mmix_operands_xyz_opt:
520		/* Like SWYM or TRAP - "X,Y,Z". */
521	38.3k	(*info->fprintf_func) (info->stream, "%d,%d,%d", x, y, z);
522	38.3k	break;
523
524	113	case mmix_operands_resume:
525		/* Just "Z", like RESUME. */
526	113	(*info->fprintf_func) (info->stream, "%d", z);
527	113	break;
528
529	0	default:
530	0	(info->fprintf_func) (info->stream, _("unknown operands type: %d*"),
531	0	opcodep->operands);
532	0	break;
533	117k	}
534
535	117k	return 4;
536	117k	}