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

Source (jump to first uncovered line)
/* mmix-dis.c -- Disassemble MMIX instructions.
   Copyright (C) 2000-2024 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: 2024-05-21 06:29

Line	Count	Source (jump to first uncovered line)
1		/* mmix-dis.c -- Disassemble MMIX instructions.
2		Copyright (C) 2000-2024 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	446	((n) == 1 ? "ROUND_OFF" : (n) == 2 ? "ROUND_UP" : \
51	271	(n) == 3 ? "ROUND_DOWN" : (n) == 4 ? "ROUND_NEAR" : \
52	75	_("(unknown)"))
53
54	66.3k	#define INSN_IMMEDIATE_BIT (IMM_OFFSET_BIT << 24)
55	12.6k	#define INSN_BACKWARD_OFFSET_BIT (1 << 24)
56
57	269k	#define MAX_REG_NAME_LEN 256
58	665	#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 ("$255")];
68		};
69
70		/* Initialize a target-specific array in INFO. */
71
72		static bool
73		initialize_mmix_dis_info (struct disassemble_info *info)
74	233	{
75	233	struct mmix_dis_info *minfop = malloc (sizeof (struct mmix_dis_info));
76	233	long i;
77
78	233	if (minfop == NULL)
79	0	return false;
80
81	233	memset (minfop, 0, sizeof (*minfop));
82
83		/* Initialize register names from register symbols. If there's no
84		register section, then there are no register symbols. */
85	233	if ((info->section != NULL && info->section->owner != NULL)
86	233	\|\| (info->symbols != NULL
87	130	&& info->symbols[0] != NULL
88	130	&& bfd_asymbol_bfd (info->symbols[0]) != NULL))
89	103	{
90	103	bfd *abfd = info->section && info->section->owner != NULL
91	103	? info->section->owner
92	103	: bfd_asymbol_bfd (info->symbols[0]);
93	103	asection reg_section = bfd_get_section_by_name (abfd, "REG*");
94
95	103	if (reg_section != NULL)
96	14	{
97		/* The returned symcount does include the ending NULL. */
98	14	long symsize = bfd_get_symtab_upper_bound (abfd);
99	14	asymbol **syms = malloc (symsize);
100	14	long nsyms;
101
102	14	if (syms == NULL)
103	0	{
104	0	FATAL_DEBUG;
105	0	free (minfop);
106	0	return false;
107	0	}
108	14	nsyms = bfd_canonicalize_symtab (abfd, syms);
109
110		/* We use the first name for a register. If this is MMO, then
111		it's the name with the first sequence number, presumably the
112		first in the source. */
113	512	for (i = 0; i < nsyms && syms[i] != NULL; i++)
114	498	{
115	498	if (syms[i]->section == reg_section
116	498	&& syms[i]->value < MAX_REG_NAME_LEN
117	498	&& minfop->reg_name[syms[i]->value] == NULL)
118	28	minfop->reg_name[syms[i]->value] = syms[i]->name;
119	498	}
120	14	free (syms);
121	14	}
122	103	}
123
124		/* Fill in the rest with the canonical names. */
125	59.8k	for (i = 0; i < MAX_REG_NAME_LEN; i++)
126	59.6k	if (minfop->reg_name[i] == NULL)
127	59.6k	{
128	59.6k	sprintf (minfop->basic_reg_name[i], "$%ld", i);
129	59.6k	minfop->reg_name[i] = minfop->basic_reg_name[i];
130	59.6k	}
131
132		/* We assume it's actually a one-to-one mapping of number-to-name. */
133	7.68k	for (i = 0; mmix_spec_regs[i].name != NULL; i++)
134	7.45k	minfop->spec_reg_name[mmix_spec_regs[i].number] = mmix_spec_regs[i].name;
135
136	233	info->private_data = (void *) minfop;
137	233	return true;
138	233	}
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	180k	{
150	180k	static const struct mmix_opcode **opcodes = NULL;
151	180k	const struct mmix_opcode *opcodep = mmix_opcodes;
152	180k	unsigned int opcode_part = (insn >> 24) & 255;
153
154	180k	if (opcodes == NULL)
155	2	opcodes = xcalloc (256, sizeof (struct mmix_opcode *));
156
157	180k	opcodep = opcodes[opcode_part];
158	180k	if (opcodep == NULL
159	180k	\|\| (opcodep->match & insn) != opcodep->match
160	180k	\|\| (opcodep->lose & insn) != 0)
161	121k	{
162		/* Search through the table. */
163	9.62M	for (opcodep = mmix_opcodes; opcodep->name != NULL; opcodep++)
164	9.62M	{
165		/* FIXME: Break out this into an initialization function. */
166	9.62M	if ((opcodep->match & (opcode_part << 24)) == opcode_part
167	9.62M	&& (opcodep->lose & (opcode_part << 24)) == 0)
168	2	opcodes[opcode_part] = opcodep;
169
170	9.62M	if ((opcodep->match & insn) == opcodep->match
171	9.62M	&& (opcodep->lose & insn) == 0)
172	117k	break;
173	9.62M	}
174	121k	}
175
176	180k	if (opcodep->name == NULL)
177	4.08k	return NULL;
178
179		/* Check constraints. If they don't match, loop through the next opcode
180		entries. */
181	176k	do
182	176k	{
183	176k	switch (opcodep->operands)
184	176k	{
185		/* These have no restraint on what can be in the lower three
186		bytes. */
187	10.5k	case mmix_operands_regs:
188	15.2k	case mmix_operands_reg_yz:
189	29.6k	case mmix_operands_regs_z_opt:
190	72.8k	case mmix_operands_regs_z:
191	73.8k	case mmix_operands_jmp:
192	74.2k	case mmix_operands_pushgo:
193	74.8k	case mmix_operands_pop:
194	77.0k	case mmix_operands_sync:
195	79.9k	case mmix_operands_x_regs_z:
196	81.6k	case mmix_operands_neg:
197	83.4k	case mmix_operands_pushj:
198	93.2k	case mmix_operands_regaddr:
199	93.4k	case mmix_operands_get:
200	93.4k	case mmix_operands_set:
201	93.4k	case mmix_operands_save:
202	93.5k	case mmix_operands_unsave:
203	167k	case mmix_operands_xyz_opt:
204	167k	return opcodep;
205
206		/* For a ROUND_MODE, the middle byte must be 0..4. */
207	6.00k	case mmix_operands_roundregs_z:
208	7.98k	case mmix_operands_roundregs:
209	7.98k	{
210	7.98k	int midbyte = (insn >> 8) & 255;
211
212	7.98k	if (midbyte <= 4)
213	3.64k	return opcodep;
214	7.98k	}
215	4.33k	break;
216
217	4.33k	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	545	if ((insn & INSN_IMMEDIATE_BIT)
221	545	\|\| ((insn >> 16) & 255) < 32)
222	493	return opcodep;
223	52	break;
224
225	52	case mmix_operands_resume:
226		/* Middle bytes must be zero. */
227	27	if ((insn & 0x00ffff00) == 0)
228	27	return opcodep;
229	0	break;
230
231	0	default:
232	0	BAD_CASE (opcodep->operands);
233	176k	}
234
235	4.38k	opcodep++;
236	4.38k	}
237	176k	while ((opcodep->match & insn) == opcodep->match
238	4.38k	&& (opcodep->lose & insn) == 0);
239
240		/* If we got here, we had no match. */
241	4.38k	return NULL;
242	176k	}
243
244		static inline const char *
245		get_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
246	208k	{
247	208k	if (x >= MAX_REG_NAME_LEN)
248	0	return _("illegal");
249	208k	return minfop->reg_name[x];
250	208k	}
251
252		static inline const char *
253		get_spec_reg_name (const struct mmix_dis_info * minfop, unsigned int x)
254	665	{
255	665	if (x >= MAX_SPEC_REG_NAME_LEN)
256	16	return _("illegal");
257	649	return minfop->spec_reg_name[x];
258	665	}
259
260		/* The main disassembly function. */
261
262		int
263		print_insn_mmix (bfd_vma memaddr, struct disassemble_info *info)
264	180k	{
265	180k	unsigned char buffer[4];
266	180k	unsigned long insn;
267	180k	unsigned int x, y, z;
268	180k	const struct mmix_opcode *opcodep;
269	180k	int status = (*info->read_memory_func) (memaddr, buffer, 4, info);
270	180k	struct mmix_dis_info *minfop;
271
272	180k	if (status != 0)
273	92	{
274	92	(*info->memory_error_func) (status, memaddr, info);
275	92	return -1;
276	92	}
277
278		/* FIXME: Is -1 suitable? */
279	180k	if (info->private_data == NULL
280	180k	&& ! initialize_mmix_dis_info (info))
281	0	return -1;
282
283	180k	minfop = (struct mmix_dis_info *) info->private_data;
284	180k	x = buffer[1];
285	180k	y = buffer[2];
286	180k	z = buffer[3];
287
288	180k	insn = bfd_getb32 (buffer);
289
290	180k	opcodep = get_opcode (insn);
291
292	180k	if (opcodep == NULL)
293	8.47k	{
294	8.47k	(info->fprintf_func) (info->stream, _("unknown*"));
295	8.47k	return 4;
296	8.47k	}
297
298	171k	(*info->fprintf_func) (info->stream, "%s ", opcodep->name);
299
300		/* Present bytes in the order they are laid out in memory. */
301	171k	info->display_endian = BFD_ENDIAN_BIG;
302
303	171k	info->insn_info_valid = 1;
304	171k	info->bytes_per_chunk = 4;
305	171k	info->branch_delay_insns = 0;
306	171k	info->target = 0;
307	171k	switch (opcodep->type)
308	171k	{
309	69.3k	case mmix_type_normal:
310	71.7k	case mmix_type_memaccess_block:
311	71.7k	info->insn_type = dis_nonbranch;
312	71.7k	break;
313
314	2.16k	case mmix_type_branch:
315	2.16k	info->insn_type = dis_branch;
316	2.16k	break;
317
318	9.14k	case mmix_type_condbranch:
319	9.14k	info->insn_type = dis_condbranch;
320	9.14k	break;
321
322	3.93k	case mmix_type_memaccess_octa:
323	3.93k	info->insn_type = dis_dref;
324	3.93k	info->data_size = 8;
325	3.93k	break;
326
327	4.09k	case mmix_type_memaccess_tetra:
328	4.09k	info->insn_type = dis_dref;
329	4.09k	info->data_size = 4;
330	4.09k	break;
331
332	2.01k	case mmix_type_memaccess_wyde:
333	2.01k	info->insn_type = dis_dref;
334	2.01k	info->data_size = 2;
335	2.01k	break;
336
337	3.39k	case mmix_type_memaccess_byte:
338	3.39k	info->insn_type = dis_dref;
339	3.39k	info->data_size = 1;
340	3.39k	break;
341
342	75.2k	case mmix_type_jsr:
343	75.2k	info->insn_type = dis_jsr;
344	75.2k	break;
345
346	0	default:
347	0	BAD_CASE(opcodep->type);
348	171k	}
349
350	171k	switch (opcodep->operands)
351	171k	{
352	10.5k	case mmix_operands_regs:
353		/* All registers: "$X,$Y,$Z". */
354	10.5k	(*info->fprintf_func) (info->stream, "%s,%s,%s",
355	10.5k	get_reg_name (minfop, x),
356	10.5k	get_reg_name (minfop, y),
357	10.5k	get_reg_name (minfop, z));
358	10.5k	break;
359
360	4.72k	case mmix_operands_reg_yz:
361		/* Like SETH - "$X,YZ". */
362	4.72k	(*info->fprintf_func) (info->stream, "%s,0x%x",
363	4.72k	get_reg_name (minfop, x), y * 256 + z);
364	4.72k	break;
365
366	14.4k	case mmix_operands_regs_z_opt:
367	57.5k	case mmix_operands_regs_z:
368	57.9k	case mmix_operands_pushgo:
369		/* The regular "$X,$Y,$Z\|Z". */
370	57.9k	if (insn & INSN_IMMEDIATE_BIT)
371	26.9k	(*info->fprintf_func) (info->stream, "%s,%s,%d",
372	26.9k	get_reg_name (minfop, x),
373	26.9k	get_reg_name (minfop, y), z);
374	31.0k	else
375	31.0k	(*info->fprintf_func) (info->stream, "%s,%s,%s",
376	31.0k	get_reg_name (minfop, x),
377	31.0k	get_reg_name (minfop, y),
378	31.0k	get_reg_name (minfop, z));
379	57.9k	break;
380
381	1.01k	case mmix_operands_jmp:
382		/* Address; only JMP. */
383	1.01k	{
384	1.01k	bfd_signed_vma offset = (x * 65536 + y * 256 + z) * 4;
385
386	1.01k	if (insn & INSN_BACKWARD_OFFSET_BIT)
387	250	offset -= (256 * 65536) * 4;
388
389	1.01k	info->target = memaddr + offset;
390	1.01k	(*info->print_address_func) (memaddr + offset, info);
391	1.01k	}
392	1.01k	break;
393
394	2.72k	case mmix_operands_roundregs_z:
395		/* Two registers, like FLOT, possibly with rounding: "$X,$Z\|Z"
396		"$X,ROUND_MODE,$Z\|Z". */
397	2.72k	if (y != 0)
398	254	{
399	254	if (insn & INSN_IMMEDIATE_BIT)
400	180	(*info->fprintf_func) (info->stream, "%s,%s,%d",
401	180	get_reg_name (minfop, x),
402	180	ROUND_MODE (y), z);
403	74	else
404	74	(*info->fprintf_func) (info->stream, "%s,%s,%s",
405	74	get_reg_name (minfop, x),
406	74	ROUND_MODE (y),
407	74	get_reg_name (minfop, z));
408	254	}
409	2.47k	else
410	2.47k	{
411	2.47k	if (insn & INSN_IMMEDIATE_BIT)
412	735	(*info->fprintf_func) (info->stream, "%s,%d",
413	735	get_reg_name (minfop, x), z);
414	1.73k	else
415	1.73k	(*info->fprintf_func) (info->stream, "%s,%s",
416	1.73k	get_reg_name (minfop, x),
417	1.73k	get_reg_name (minfop, z));
418	2.47k	}
419	2.72k	break;
420
421	603	case mmix_operands_pop:
422		/* Like POP - "X,YZ". */
423	603	(info->fprintf_func) (info->stream, "%d,%d", x, y256 + z);
424	603	break;
425
426	918	case mmix_operands_roundregs:
427		/* Two registers, possibly with rounding: "$X,$Z" or
428		"$X,ROUND_MODE,$Z". */
429	918	if (y != 0)
430	192	(*info->fprintf_func) (info->stream, "%s,%s,%s",
431	192	get_reg_name (minfop, x),
432	192	ROUND_MODE (y),
433	192	get_reg_name (minfop, z));
434	726	else
435	726	(*info->fprintf_func) (info->stream, "%s,%s",
436	726	get_reg_name (minfop, x),
437	726	get_reg_name (minfop, z));
438	918	break;
439
440	2.14k	case mmix_operands_sync:
441		/* Like SYNC - "XYZ". */
442	2.14k	(*info->fprintf_func) (info->stream, "%u",
443	2.14k	x * 65536 + y * 256 + z);
444	2.14k	break;
445
446	2.91k	case mmix_operands_x_regs_z:
447		/* Like SYNCD - "X,$Y,$Z\|Z". */
448	2.91k	if (insn & INSN_IMMEDIATE_BIT)
449	1.52k	(*info->fprintf_func) (info->stream, "%d,%s,%d",
450	1.52k	x, get_reg_name (minfop, y), z);
451	1.38k	else
452	1.38k	(*info->fprintf_func) (info->stream, "%d,%s,%s",
453	1.38k	x, get_reg_name (minfop, y),
454	1.38k	get_reg_name (minfop, z));
455	2.91k	break;
456
457	1.72k	case mmix_operands_neg:
458		/* Like NEG and NEGU - "$X,Y,$Z\|Z". */
459	1.72k	if (insn & INSN_IMMEDIATE_BIT)
460	620	(*info->fprintf_func) (info->stream, "%s,%d,%d",
461	620	get_reg_name (minfop, x), y, z);
462	1.10k	else
463	1.10k	(*info->fprintf_func) (info->stream, "%s,%d,%s",
464	1.10k	get_reg_name (minfop, x), y,
465	1.10k	get_reg_name (minfop, z));
466	1.72k	break;
467
468	1.79k	case mmix_operands_pushj:
469	11.6k	case mmix_operands_regaddr:
470		/* Like GETA or branches - "$X,Address". */
471	11.6k	{
472	11.6k	bfd_signed_vma offset = (y * 256 + z) * 4;
473
474	11.6k	if (insn & INSN_BACKWARD_OFFSET_BIT)
475	5.40k	offset -= 65536 * 4;
476
477	11.6k	info->target = memaddr + offset;
478
479	11.6k	(*info->fprintf_func) (info->stream, "%s,", get_reg_name (minfop, x));
480	11.6k	(*info->print_address_func) (memaddr + offset, info);
481	11.6k	}
482	11.6k	break;
483
484	172	case mmix_operands_get:
485		/* GET - "X,spec_reg". */
486	172	(*info->fprintf_func) (info->stream, "%s,%s",
487	172	get_reg_name (minfop, x),
488	172	get_spec_reg_name (minfop, z));
489	172	break;
490
491	493	case mmix_operands_put:
492		/* PUT - "spec_reg,$Z\|Z". */
493	493	if (insn & INSN_IMMEDIATE_BIT)
494	240	(*info->fprintf_func) (info->stream, "%s,%d",
495	240	get_spec_reg_name (minfop, x), z);
496	253	else
497	253	(*info->fprintf_func) (info->stream, "%s,%s",
498	253	get_spec_reg_name (minfop, x),
499	253	get_reg_name (minfop, z));
500	493	break;
501
502	23	case mmix_operands_set:
503		/* Two registers, "$X,$Y". */
504	23	(*info->fprintf_func) (info->stream, "%s,%s",
505	23	get_reg_name (minfop, x),
506	23	get_reg_name (minfop, y));
507	23	break;
508
509	19	case mmix_operands_save:
510		/* SAVE - "$X,0". */
511	19	(*info->fprintf_func) (info->stream, "%s,0", minfop->reg_name[x]);
512	19	break;
513
514	6	case mmix_operands_unsave:
515		/* UNSAVE - "0,$Z". */
516	6	(*info->fprintf_func) (info->stream, "0,%s", minfop->reg_name[z]);
517	6	break;
518
519	74.1k	case mmix_operands_xyz_opt:
520		/* Like SWYM or TRAP - "X,Y,Z". */
521	74.1k	(*info->fprintf_func) (info->stream, "%d,%d,%d", x, y, z);
522	74.1k	break;
523
524	27	case mmix_operands_resume:
525		/* Just "Z", like RESUME. */
526	27	(*info->fprintf_func) (info->stream, "%d", z);
527	27	break;
528
529	0	default:
530	0	(info->fprintf_func) (info->stream, _("unknown operands type: %d*"),
531	0	opcodep->operands);
532	0	break;
533	171k	}
534
535	171k	return 4;
536	171k	}