m32r-dis.c

基于4个mips核的noc设计

/* Disassembler interface for targets using CGEN. -*- C -*-
   CGEN: Cpu tools GENerator

THIS FILE IS MACHINE GENERATED WITH CGEN.
- the resultant file is machine generated, cgen-dis.in isn't

Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

This file is part of the GNU Binutils and GDB, the GNU debugger.

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

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

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

/* ??? Eventually more and more of this stuff can go to cpu-independent files.
   Keep that in mind.  */

#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
#include "dis-asm.h"
#include "bfd.h"
#include "symcat.h"
#include "m32r-desc.h"
#include "m32r-opc.h"
#include "opintl.h"

/* Default text to print if an instruction isn't recognized.  */
#define UNKNOWN_INSN_MSG _("*unknown*")

static void print_normal
     PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int));
static void print_address
     PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int));
static void print_keyword
     PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int));
static void print_insn_normal
     PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *,
	      bfd_vma, int));
static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma,
			       disassemble_info *, char *, int));
static int default_print_insn
     PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));

/* -- disassembler routines inserted here */

/* -- dis.c */

/* Immediate values are prefixed with '#'.  */

#define CGEN_PRINT_NORMAL(cd, info, value, attrs, pc, length) \
do { \
  if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_HASH_PREFIX)) \
    (*info->fprintf_func) (info->stream, "#"); \
} while (0)

/* Handle '#' prefixes as operands.  */

static void
print_hash (cd, dis_info, value, attrs, pc, length)
     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
     PTR dis_info;
     long value ATTRIBUTE_UNUSED;
     unsigned int attrs ATTRIBUTE_UNUSED;
     bfd_vma pc ATTRIBUTE_UNUSED;
     int length ATTRIBUTE_UNUSED;
{
  disassemble_info *info = (disassemble_info *) dis_info;
  (*info->fprintf_func) (info->stream, "#");
}

#undef CGEN_PRINT_INSN
#define CGEN_PRINT_INSN my_print_insn

static int
my_print_insn (cd, pc, info)
     CGEN_CPU_DESC cd;
     bfd_vma pc;
     disassemble_info *info;
{
  char buffer[CGEN_MAX_INSN_SIZE];
  char *buf = buffer;
  int status;
  int buflen = (pc & 3) == 0 ? 4 : 2;

  /* Read the base part of the insn.  */

  status = (*info->read_memory_func) (pc, buf, buflen, info);
  if (status != 0)
    {
      (*info->memory_error_func) (status, pc, info);
      return -1;
    }

  /* 32 bit insn?  */
  if ((pc & 3) == 0 && (buf[0] & 0x80) != 0)
    return print_insn (cd, pc, info, buf, buflen);

  /* Print the first insn.  */
  if ((pc & 3) == 0)
    {
      if (print_insn (cd, pc, info, buf, 2) == 0)
	(*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
      buf += 2;
    }

  if (buf[0] & 0x80)
    {
      /* Parallel.  */
      (*info->fprintf_func) (info->stream, " || ");
      buf[0] &= 0x7f;
    }
  else
    (*info->fprintf_func) (info->stream, " -> ");

  /* The "& 3" is to pass a consistent address.
     Parallel insns arguably both begin on the word boundary.
     Also, branch insns are calculated relative to the word boundary.  */
  if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0)
    (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);

  return (pc & 3) ? 2 : 4;
}

/* -- */

/* Main entry point for printing operands.
   XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
   of dis-asm.h on cgen.h.

   This function is basically just a big switch statement.  Earlier versions
   used tables to look up the function to use, but
   - if the table contains both assembler and disassembler functions then
     the disassembler contains much of the assembler and vice-versa,
   - there's a lot of inlining possibilities as things grow,
   - using a switch statement avoids the function call overhead.

   This function could be moved into `print_insn_normal', but keeping it
   separate makes clear the interface between `print_insn_normal' and each of
   the handlers.
*/

void
m32r_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length)
     CGEN_CPU_DESC cd;
     int opindex;
     PTR xinfo;
     CGEN_FIELDS *fields;
     void const *attrs ATTRIBUTE_UNUSED;
     bfd_vma pc;
     int length;
{
 disassemble_info *info = (disassemble_info *) xinfo;

  switch (opindex)
    {
    case M32R_OPERAND_ACC :
      print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_acc, 0);
      break;
    case M32R_OPERAND_ACCD :
      print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accd, 0);
      break;
    case M32R_OPERAND_ACCS :
      print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accs, 0);
      break;
    case M32R_OPERAND_DCR :
      print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r1, 0);
      break;
    case M32R_OPERAND_DISP16 :
      print_address (cd, info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
      break;
    case M32R_OPERAND_DISP24 :
      print_address (cd, info, fields->f_disp24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
      break;
    case M32R_OPERAND_DISP8 :
      print_address (cd, info, fields->f_disp8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
      break;
    case M32R_OPERAND_DR :
      print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
      break;
    case M32R_OPERAND_HASH :
      print_hash (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
      break;
    case M32R_OPERAND_HI16 :
      print_normal (cd, info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
      break;
    case M32R_OPERAND_IMM1 :
      print_normal (cd, info, fields->f_imm1, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_SCR :
      print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r2, 0);
      break;
    case M32R_OPERAND_SIMM16 :
      print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_SIMM8 :
      print_normal (cd, info, fields->f_simm8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_SLO16 :
      print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
      break;
    case M32R_OPERAND_SR :
      print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
      break;
    case M32R_OPERAND_SRC1 :
      print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
      break;
    case M32R_OPERAND_SRC2 :
      print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
      break;
    case M32R_OPERAND_UIMM16 :
      print_normal (cd, info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_UIMM24 :
      print_address (cd, info, fields->f_uimm24, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
      break;
    case M32R_OPERAND_UIMM4 :
      print_normal (cd, info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_UIMM5 :
      print_normal (cd, info, fields->f_uimm5, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
      break;
    case M32R_OPERAND_ULO16 :
      print_normal (cd, info, fields->f_uimm16, 0, pc, length);
      break;

    default :
      /* xgettext:c-format */
      fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
	       opindex);
    abort ();
  }
}

cgen_print_fn * const m32r_cgen_print_handlers[] = 
{
  print_insn_normal,
};


void
m32r_cgen_init_dis (cd)
     CGEN_CPU_DESC cd;
{
  m32r_cgen_init_opcode_table (cd);
  m32r_cgen_init_ibld_table (cd);
  cd->print_handlers = & m32r_cgen_print_handlers[0];
  cd->print_operand = m32r_cgen_print_operand;
}


/* Default print handler.  */

static void
print_normal (cd, dis_info, value, attrs, pc, length)
     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
     PTR dis_info;
     long value;
     unsigned int attrs;
     bfd_vma pc ATTRIBUTE_UNUSED;
     int length ATTRIBUTE_UNUSED;
{
  disassemble_info *info = (disassemble_info *) dis_info;

#ifdef CGEN_PRINT_NORMAL
  CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
#endif

  /* Print the operand as directed by the attributes.  */
  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
    ; /* nothing to do */
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
    (*info->fprintf_func) (info->stream, "%ld", value);
  else
    (*info->fprintf_func) (info->stream, "0x%lx", value);
}

/* Default address handler.  */

static void
print_address (cd, dis_info, value, attrs, pc, length)
     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
     PTR dis_info;
     bfd_vma value;
     unsigned int attrs;
     bfd_vma pc ATTRIBUTE_UNUSED;
     int length ATTRIBUTE_UNUSED;
{
  disassemble_info *info = (disassemble_info *) dis_info;

#ifdef CGEN_PRINT_ADDRESS
  CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
#endif

  /* Print the operand as directed by the attributes.  */
  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
    ; /* nothing to do */
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
    (*info->print_address_func) (value, info);
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
    (*info->print_address_func) (value, info);
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
    (*info->fprintf_func) (info->stream, "%ld", (long) value);
  else
    (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
}

/* Keyword print handler.  */