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[binutils.git] / gas / config / tc-w65.c

/* tc-w65.c -- Assemble code for the W65816
   Copyright 1995, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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.

   GAS 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 GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

/* Written By Steve Chamberlain <sac@cygnus.com>.  */

#include <stdio.h>
#include "as.h"
#include "bfd.h"
#include "subsegs.h"
#define DEFINE_TABLE
#include "../opcodes/w65-opc.h"

const char comment_chars[] = "!";
const char line_separator_chars[] = ";";
const char line_comment_chars[] = "!#";

/* This table describes all the machine specific pseudo-ops the assembler
   has to support.  The fields are:

   pseudo-op name without dot
   function to call to execute this pseudo-op
   Integer arg to pass to the function  */

#define OP_BCC  0x90
#define OP_BCS  0xB0
#define OP_BEQ  0xF0
#define OP_BMI  0x30
#define OP_BNE  0xD0
#define OP_BPL  0x10
#define OP_BRA  0x80
#define OP_BRL  0x82
#define OP_BVC  0x50
#define OP_BVS  0x70

static void s_longa PARAMS ((int));
static char *parse_exp PARAMS ((char *));
static char *get_operands PARAMS ((const struct opinfo *, char *));
static const struct opinfo *get_specific PARAMS ((const struct opinfo *));
static void build_Mytes PARAMS ((const struct opinfo *));


const pseudo_typeS md_pseudo_table[] = {
  {"int", cons, 2},
  {"word", cons, 2},
  {"longa", s_longa, 0},
  {"longi", s_longa, 1},
  {0, 0, 0}
};

#if 0
int md_reloc_size;
#endif

const char EXP_CHARS[] = "eE";

/* Chars that mean this number is a floating point constant.  */
/* As in 0f12.456 */
/* or    0d1.2345e12 */
const char FLT_CHARS[] = "rRsSfFdDxXpP";

/* Opcode mnemonics */
static struct hash_control *opcode_hash_control;

int M;                          /* M flag */
int X;                          /* X flag */

#define C(a,b) ENCODE_RELAX(a,b)
#define ENCODE_RELAX(what,length) (((what) << 2) + (length))

#define GET_WHAT(x) ((x>>2))

#define BYTE_DISP 1
#define WORD_DISP 2
#define UNDEF_BYTE_DISP 0
#define UNDEF_WORD_DISP 3

#define COND_BRANCH     1
#define UNCOND_BRANCH   2
#define END     3

#define BYTE_F 127              /* How far we can branch forwards */
#define BYTE_B -126             /* How far we can branch backwards */
#define WORD_F 32767
#define WORD_B 32768

relax_typeS md_relax_table[C (END, 0)] = {
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },

  /* COND_BRANCH */
  { 0,       0,       0,  0 },                          /* UNDEF_BYTE_DISP */
  { BYTE_F,  BYTE_B,  2,  C (COND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
  { WORD_F,  WORD_B,  5,  0 },                          /* WORD_DISP */
  { 0,       0,       5,  0 },                          /* UNDEF_WORD_DISP */

  /* UNCOND_BRANCH */
  { 0,       0,       0,  0 },                            /* UNDEF_BYTE_DISP */
  { BYTE_F,  BYTE_B,  2,  C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
  { WORD_F,  WORD_B,  3,  0 },                            /* WORD_DISP */
  { 0,       0,       3,  0 }                             /* UNDEF_WORD_DISP */

};

/* This function is called once, at assembler startup time.  This
   should set up all the tables, etc that the MD part of the assembler
   needs.  */

static void
s_longa (xmode)
     int xmode;
{
  int *p = xmode ? &X : &M;
  while (*input_line_pointer == ' ')
    input_line_pointer++;
  if (strncmp (input_line_pointer, "on", 2) == 0)
    {
      input_line_pointer += 2;
      *p = 0;
    }
  else if (strncmp (input_line_pointer, "off", 3) == 0)
    {
      *p = 1;
      input_line_pointer += 3;
    }
  else
    as_bad (_("need on or off."));
  demand_empty_rest_of_line ();
}

void
md_begin ()
{
  const struct opinfo *opcode;
  char *prev_name = "";

  opcode_hash_control = hash_new ();

  /* Insert unique names into hash table.  */
  for (opcode = optable; opcode->name; opcode++)
    {
      if (strcmp (prev_name, opcode->name))
        {
          prev_name = opcode->name;
          hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
        }
    }

  flag_signed_overflow_ok = 1;
}

static expressionS immediate;   /* absolute expression */
static expressionS immediate1;  /* absolute expression */
int expr_size;
int expr_shift;
int tc_cons_reloc;

void
w65_expression (dest)
     expressionS *dest;
{
  expr_size = 0;
  expr_shift = 0;
  tc_cons_reloc = 0;
  while (*input_line_pointer == ' ')
    input_line_pointer++;

  if (*input_line_pointer == '<')
    {
      expr_size = 1;
      input_line_pointer++;
    }
  else if (*input_line_pointer == '>')
    {
      expr_shift = 1;
      input_line_pointer++;
    }
  else if (*input_line_pointer == '^')
    {
      expr_shift = 2;
      input_line_pointer++;
    }

  expr (0, dest);
}

int amode;

static char *
parse_exp (s)
     char *s;
{
  char *save;
  char *new;

  save = input_line_pointer;
  input_line_pointer = s;
  w65_expression (&immediate);
  if (immediate.X_op == O_absent)
    as_bad (_("missing operand"));
  new = input_line_pointer;
  input_line_pointer = save;
  return new;
}

static char *
get_operands (info, ptr)
     const struct opinfo *info;
     char *ptr;
{
  register int override_len = 0;
  register int bytes = 0;

  while (*ptr == ' ')
    ptr++;

  if (ptr[0] == '#')
    {
      ptr++;
      switch (info->amode)
        {
        case ADDR_IMMTOI:
          bytes = X ? 1 : 2;
          amode = ADDR_IMMTOI;
          break;
        case ADDR_IMMTOA:
          bytes = M ? 1 : 2;
          amode = ADDR_IMMTOA;
          break;
        case ADDR_IMMCOP:
          bytes = 1;
          amode = ADDR_IMMCOP;
          break;
        case ADDR_DIR:
          bytes = 2;
          amode = ADDR_ABS;
          break;
        default:
          abort ();
          break;
        }
      ptr = parse_exp (ptr);
    }
  else if (ptr[0] == '!')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',')
        {
          if (ptr[1] == 'y')
            {
              amode = ADDR_ABS_IDX_Y;
              bytes = 2;
              ptr += 2;
            }
          else if (ptr[1] == 'x')
            {
              amode = ADDR_ABS_IDX_X;
              bytes = 2;
              ptr += 2;
            }
          else
            {
              as_bad (_("syntax error after <exp"));
            }
        }
      else
        {
          amode = ADDR_ABS;
          bytes = 2;
        }
    }
  else if (ptr[0] == '>')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',' && ptr[1] == 'x')
        {
          amode = ADDR_ABS_LONG_IDX_X;
          bytes = 3;
          ptr += 2;
        }
      else
        {
          amode = ADDR_ABS_LONG;
          bytes = 3;
        }
    }
  else if (ptr[0] == '<')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',')
        {
          if (ptr[1] == 'y')
            {
              amode = ADDR_DIR_IDX_Y;
              ptr += 2;
              bytes = 2;
            }
          else if (ptr[1] == 'x')
            {
              amode = ADDR_DIR_IDX_X;
              ptr += 2;
              bytes = 2;
            }
          else
            {
              as_bad (_("syntax error after <exp"));
            }
        }
      else
        {
          amode = ADDR_DIR;
          bytes = 1;
        }
    }
  else if (ptr[0] == 'a')
    {
      amode = ADDR_ACC;
    }
  else if (ptr[0] == '(')
    {
      /* Look for (exp),y
         (<exp),y
         (exp,x)
         (<exp,x)
         (exp)
         (!exp)
         (exp)
         (<exp)
         (exp,x)
         (!exp,x)
         (exp,s)
         (exp,s),y */

      ptr++;
      if (ptr[0] == '<')
        {
          override_len = 1;
          ptr++;
        }
      else if (ptr[0] == '!')
        {
          override_len = 2;
          ptr++;
        }
      else if (ptr[0] == '>')
        {
          override_len = 3;
          ptr++;
        }
      else
        {
          override_len = 0;
        }
      ptr = parse_exp (ptr);

      if (ptr[0] == ',')
        {
          ptr++;
          if (ptr[0] == 'x' && ptr[1] == ')')
            {
              ptr += 2;

              if (override_len == 1)
                {
                  amode = ADDR_DIR_IDX_IND_X;
                  bytes = 2;
                }
              else
                {
                  amode = ADDR_ABS_IND_IDX;
                  bytes = 2;
                }
            }
          else if (ptr[0] == 's' && ptr[1] == ')'
                   && ptr[2] == ',' && ptr[3] == 'y')
            {
              amode = ADDR_STACK_REL_INDX_IDX;
              bytes = 1;
              ptr += 4;
            }
        }
      else if (ptr[0] == ')')
        {
          if (ptr[1] == ',' && ptr[2] == 'y')
            {
              amode = ADDR_DIR_IND_IDX_Y;
              ptr += 3;
              bytes = 2;
            }
          else
            {
              if (override_len == 1)
                {
                  amode = ADDR_DIR_IND;
                  bytes = 1;
                }
              else
                {
                  amode = ADDR_ABS_IND;
                  bytes = 2;
                }
              ptr++;

            }
        }
    }
  else if (ptr[0] == '[')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ']')
        {
          ptr++;
          if (ptr[0] == ',' && ptr[1] == 'y')
            {
              bytes = 1;
              amode = ADDR_DIR_IND_IDX_Y_LONG;
              ptr += 2;
            }
          else
            {
              if (info->code == O_jmp)
                {
                  bytes = 2;
                  amode = ADDR_ABS_IND_LONG;
                }
              else
                {
                  bytes = 1;
                  amode = ADDR_DIR_IND_LONG;
                }
            }
        }
    }
  else
    {
      ptr = parse_exp (ptr);
      if (ptr[0] == ',')
        {
          if (ptr[1] == 'y')
            {
              if (override_len == 1)
                {
                  bytes = 1;
                  amode = ADDR_DIR_IDX_Y;
                }
              else
                {
                  amode = ADDR_ABS_IDX_Y;
                  bytes = 2;
                }
              ptr += 2;
            }
          else if (ptr[1] == 'x')
            {
              if (override_len == 1)
                {
                  amode = ADDR_DIR_IDX_X;
                  bytes = 1;
                }
              else
                {
                  amode = ADDR_ABS_IDX_X;
                  bytes = 2;
                }
              ptr += 2;
            }
          else if (ptr[1] == 's')
            {
              bytes = 1;
              amode = ADDR_STACK_REL;
              ptr += 2;
            }
          else
            {
              bytes = 1;
              immediate1 = immediate;
              ptr = parse_exp (ptr + 1);
              amode = ADDR_BLOCK_MOVE;
            }
        }
      else
        {
          switch (info->amode)
            {
            case ADDR_PC_REL:
              amode = ADDR_PC_REL;
              bytes = 1;
              break;
            case ADDR_PC_REL_LONG:
              amode = ADDR_PC_REL_LONG;
              bytes = 2;
              break;
            default:
              if (override_len == 1)
                {
                  amode = ADDR_DIR;
                  bytes = 1;
                }
              else if (override_len == 3)
                {
                  bytes = 3;
                  amode = ADDR_ABS_LONG;
                }
              else
                {
                  amode = ADDR_ABS;
                  bytes = 2;
                }
            }
        }
    }

  switch (bytes)
    {
    case 1:
      switch (expr_shift)
        {
        case 0:
          if (amode == ADDR_DIR)
            tc_cons_reloc = R_W65_DP;
          else
            tc_cons_reloc = R_W65_ABS8;
          break;
        case 1:
          tc_cons_reloc = R_W65_ABS8S8;
          break;
        case 2:
          tc_cons_reloc = R_W65_ABS8S16;
          break;
        }
      break;
    case 2:
      switch (expr_shift)
        {
        case 0:
          tc_cons_reloc = R_W65_ABS16;
          break;
        case 1:
          tc_cons_reloc = R_W65_ABS16S8;
          break;
        case 2:
          tc_cons_reloc = R_W65_ABS16S16;
          break;
        }
    }
  return ptr;
}

/* Passed a pointer to a list of opcodes which use different
   addressing modes, return the opcode which matches the opcodes
   provided.  */

static const struct opinfo *
get_specific (opcode)
     const struct opinfo *opcode;
{
  int ocode = opcode->code;

  for (; opcode->code == ocode; opcode++)
    {
      if (opcode->amode == amode)
        return opcode;
    }
  return 0;
}

/* Now we know what sort of opcodes it is, let's build the bytes.  */

static void
build_Mytes (opcode)
     const struct opinfo *opcode;
{
  int size;
  int type;
  int pcrel;
  char *output;

  if (opcode->amode == ADDR_IMPLIED)
    {
      output = frag_more (1);
    }
  else if (opcode->amode == ADDR_PC_REL)
    {
      int type;

      /* This is a relaxable insn, so we do some special handling.  */
      type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH;
      output = frag_var (rs_machine_dependent,
                         md_relax_table[C (type, WORD_DISP)].rlx_length,
                         md_relax_table[C (type, BYTE_DISP)].rlx_length,
                         C (type, UNDEF_BYTE_DISP),
                         immediate.X_add_symbol,
                         immediate.X_add_number,
                         0);
    }
  else
    {
      switch (opcode->amode)
        {
          GETINFO (size, type, pcrel);
        default:
          abort ();
        }

      /* If something special was done in the expression modify the
         reloc type.  */
      if (tc_cons_reloc)
        type = tc_cons_reloc;

      /* 1 byte for the opcode + the bytes for the addrmode.  */
      output = frag_more (size + 1);

      if (opcode->amode == ADDR_BLOCK_MOVE)
        {
          /* Two relocs for this one.  */
          fix_new_exp (frag_now,
                       output + 1 - frag_now->fr_literal,
                       1,
                       &immediate,
                       0,
                       R_W65_ABS8S16);

          fix_new_exp (frag_now,
                       output + 2 - frag_now->fr_literal,
                       1,
                       &immediate1,
                       0,
                       R_W65_ABS8S16);
        }
      else if (type >= 0
               && opcode->amode != ADDR_IMPLIED
               && opcode->amode != ADDR_ACC
               && opcode->amode != ADDR_STACK)
        {
          fix_new_exp (frag_now,
                       output + 1 - frag_now->fr_literal,
                       size,
                       &immediate,
                       pcrel,
                       type);
        }
    }
  output[0] = opcode->val;
}

/* This is the guts of the machine-dependent assembler.  STR points to
   a machine dependent instruction.  This function is supposed to emit
   the frags/bytes it assembles to.  */

void
md_assemble (str)
     char *str;
{
  const struct opinfo *opcode;
  char name[20];

  /* Drop leading whitespace */
  while (*str == ' ')
    str++;

  /* all opcodes are three letters */
  name[0] = str[0];
  name[1] = str[1];
  name[2] = str[2];
  name[3] = 0;

  tc_cons_reloc = 0;
  str += 3;
  opcode = (struct opinfo *) hash_find (opcode_hash_control, name);

  if (opcode == NULL)
    {
      as_bad (_("unknown opcode"));
      return;
    }

  if (opcode->amode != ADDR_IMPLIED
      && opcode->amode != ADDR_STACK)
    {
      get_operands (opcode, str);
      opcode = get_specific (opcode);
    }

  if (opcode == 0)
    {
      /* Couldn't find an opcode which matched the operands.  */

      char *where = frag_more (1);

      where[0] = 0x0;
      where[1] = 0x0;
      as_bad (_("invalid operands for opcode"));
      return;
    }

  build_Mytes (opcode);
}

symbolS *
md_undefined_symbol (name)
     char *name ATTRIBUTE_UNUSED;
{
  return 0;
}

/* Various routines to kill one day.  */
/* Equal to MAX_PRECISION in atof-ieee.c.  */
#define MAX_LITTLENUMS 6

/* Turn a string in input_line_pointer into a floating point constant
   of type TYPE, and store the appropriate bytes in *LITP.  The number
   of LITTLENUMS emitted is stored in *SIZEP.  An error message is
   returned, or NULL on OK.  */

char *
md_atof (type, litP, sizeP)
     char type;
     char *litP;
     int *sizeP;
{
  int prec;
  LITTLENUM_TYPE words[MAX_LITTLENUMS];
  LITTLENUM_TYPE *wordP;
  char *t;

  switch (type)
    {
    case 'f':
    case 'F':
    case 's':
    case 'S':
      prec = 2;
      break;

    case 'd':
    case 'D':
    case 'r':
    case 'R':
      prec = 4;
      break;

    case 'x':
    case 'X':
      prec = 6;
      break;

    case 'p':
    case 'P':
      prec = 6;
      break;

    default:
      *sizeP = 0;
      return _("Bad call to MD_NTOF()");
    }
  t = atof_ieee (input_line_pointer, type, words);
  if (t)
    input_line_pointer = t;

  *sizeP = prec * sizeof (LITTLENUM_TYPE);
  for (wordP = words + prec - 1; prec--;)
    {
      md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
      litP += sizeof (LITTLENUM_TYPE);
    }
  return 0;
}

int
md_parse_option (c, a)
     int c ATTRIBUTE_UNUSED;
     char *a ATTRIBUTE_UNUSED;
{
  return 0;
}

/* Called after relaxing, change the frags so they know how big they
   are.  */

void
md_convert_frag (headers, seg, fragP)
     object_headers *headers ATTRIBUTE_UNUSED;
     segT seg ATTRIBUTE_UNUSED;
     fragS *fragP;
{
  int disp_size = 0;
  int inst_size = 0;
  unsigned char *buffer =
    (unsigned char *) (fragP->fr_fix + fragP->fr_literal);

  switch (fragP->fr_subtype)
    {
    case C (COND_BRANCH, BYTE_DISP):
    case C (UNCOND_BRANCH, BYTE_DISP):
      disp_size = 1;
      inst_size = 1;
      break;

      /* Conditional branches to a known 16 bit displacement.  */
    case C (COND_BRANCH, WORD_DISP):
      switch (buffer[0])
        {
        case OP_BCC:
        case OP_BCS:
        case OP_BEQ:
        case OP_BMI:
        case OP_BNE:
        case OP_BPL:
        case OP_BVS:
        case OP_BVC:
          /* Invert the sense of the test */
          buffer[0] ^= 0x20;
          buffer[1] = 3;        /* Jump over following brl */
          buffer[2] = OP_BRL;
          buffer[3] = 0;
          buffer[4] = 0;
          disp_size = 2;
          inst_size = 3;
          break;
        default:
          abort ();
        }
      break;
    case C (UNCOND_BRANCH, WORD_DISP):
      /* Unconditional branches to a known 16 bit displacement.  */

      switch (buffer[0])
        {
        case OP_BRA:
          buffer[0] = OP_BRL;
          disp_size = 2;
          inst_size = 1;
          break;
        default:
          abort ();
        }
      break;
      /* Got to create a branch over a reloc here.  */
    case C (COND_BRANCH, UNDEF_WORD_DISP):
      buffer[0] ^= 0x20;        /* invert test */
      buffer[1] = 3;
      buffer[2] = OP_BRL;
      buffer[3] = 0;
      buffer[4] = 0;
      fix_new (fragP,
               fragP->fr_fix + 3,
               4,
               fragP->fr_symbol,
               fragP->fr_offset,
               0,
               R_W65_PCR16);

      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
      break;
    case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
      buffer[0] = OP_BRL;
      buffer[1] = 0;
      buffer[2] = 0;
      fix_new (fragP,
               fragP->fr_fix + 1,
               4,
               fragP->fr_symbol,
               fragP->fr_offset,
               0,
               R_W65_PCR16);

      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
      break;
    default:
      abort ();
    }
  if (inst_size)
    {
      /* Get the address of the end of the instruction.  */
      int next_inst = (fragP->fr_fix + fragP->fr_address
                       + disp_size + inst_size);
      int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
                       fragP->fr_offset);
      int disp = targ_addr - next_inst;

      md_number_to_chars (buffer + inst_size, disp, disp_size);
      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
    }
}

valueT
md_section_align (seg, size)
     segT seg;
     valueT size;
{
  return ((size + (1 << section_alignment[(int) seg]) - 1)
          & (-1 << section_alignment[(int) seg]));
}

void
md_apply_fix3 (fixP, valP, seg)
     fixS *fixP;
     valueT * valP;
     segT seg ATTRIBUTE_UNUSED;
{
  long val = * (long *) valP;
  char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
  int addr = fixP->fx_frag->fr_address + fixP->fx_where;

  if (fixP->fx_r_type == 0)
    {
      if (fixP->fx_size == 1)
        fixP->fx_r_type = R_W65_ABS8;
      else
        fixP->fx_r_type = R_W65_ABS16;
    }

  switch (fixP->fx_r_type)
    {
    case R_W65_ABS8S16:
      val >>= 8;
    case R_W65_ABS8S8:
      val >>= 8;
    case R_W65_ABS8:
      *buf++ = val;
      break;
    case R_W65_ABS16S16:
      val >>= 8;
    case R_W65_ABS16S8:
      val >>= 8;
    case R_W65_ABS16:
      *buf++ = val >> 0;
      *buf++ = val >> 8;
      break;
    case R_W65_ABS24:
      *buf++ = val >> 0;
      *buf++ = val >> 8;
      *buf++ = val >> 16;
      break;
    case R_W65_PCR8:
      *buf++ = val - addr - 1;
      break;
    case R_W65_PCR16:
      val = val - addr - 1;
      *buf++ = val;
      *buf++ = val >> 8;
      break;
    case R_W65_DP:
      *buf++ = val;
      break;

    default:
      abort ();
    }

  if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
    fixP->fx_done = 1;
}

/* Put number into target byte order.  */

void
md_number_to_chars (ptr, use, nbytes)
     char *ptr;
     valueT use;
     int nbytes;
{
  number_to_chars_littleendian (ptr, use, nbytes);
}

long
md_pcrel_from (fixP)
     fixS *fixP;
{
  int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1;
  return gap;
}

void
tc_coff_symbol_emit_hook (x)
     symbolS *x ATTRIBUTE_UNUSED;
{
}

short
tc_coff_fix2rtype (fix_ptr)
     fixS *fix_ptr;
{
  return fix_ptr->fx_r_type;
}

void
tc_reloc_mangle (fix_ptr, intr, base)
     fixS *fix_ptr;
     struct internal_reloc *intr;
     bfd_vma base;

{
  symbolS *symbol_ptr;

  symbol_ptr = fix_ptr->fx_addsy;

  /* If this relocation is attached to a symbol then it's ok
     to output it */
  if (fix_ptr->fx_r_type == RELOC_32)
    {
      /* cons likes to create reloc32's whatever the size of the reloc..
       */
      switch (fix_ptr->fx_size)
        {
        case 2:
          intr->r_type = R_IMM16;
          break;
        case 1:
          intr->r_type = R_IMM8;
          break;
        default:
          abort ();
        }
    }
  else
    {
      if (fix_ptr->fx_size == 4)
        intr->r_type = R_W65_ABS24;
      else
        intr->r_type = fix_ptr->fx_r_type;
    }

  intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
  intr->r_offset = fix_ptr->fx_offset;

  /* Turn the segment of the symbol into an offset.  */
  if (symbol_ptr)
    {
      symbolS *dot;

      dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
      if (dot)
        {
          intr->r_offset += S_GET_VALUE (symbol_ptr);
          intr->r_symndx = dot->sy_number;
        }
      else
        {
          intr->r_symndx = symbol_ptr->sy_number;
        }
    }
  else
    {
      intr->r_symndx = -1;
    }
}

int
tc_coff_sizemachdep (frag)
     fragS *frag;
{
  return md_relax_table[frag->fr_subtype].rlx_length;
}

/* Called just before address relaxation, return the length by which a
   fragment must grow to reach it's destination.  */

int
md_estimate_size_before_relax (fragP, segment_type)
     register fragS *fragP;
     register segT segment_type;
{
  int what;

  switch (fragP->fr_subtype)
    {
    default:
      abort ();

    case C (COND_BRANCH, UNDEF_BYTE_DISP):
    case C (UNCOND_BRANCH, UNDEF_BYTE_DISP):
      what = GET_WHAT (fragP->fr_subtype);
      /* Used to be a branch to somewhere which was unknown.  */
      if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
        {
          /* Got a symbol and it's defined in this segment, become byte
             sized - maybe it will fix up.  */
          fragP->fr_subtype = C (what, BYTE_DISP);
        }
      else
        {
          /* Its got a segment, but its not ours, so it will always be
             long.  */
          fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
        }
      break;

    case C (COND_BRANCH, BYTE_DISP):
    case C (COND_BRANCH, WORD_DISP):
    case C (COND_BRANCH, UNDEF_WORD_DISP):
    case C (UNCOND_BRANCH, BYTE_DISP):
    case C (UNCOND_BRANCH, WORD_DISP):
    case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
      /* When relaxing a section for the second time, we don't need to
         do anything besides return the current size.  */
      break;
    }

  fragP->fr_var = md_relax_table[fragP->fr_subtype].rlx_length;
  return fragP->fr_var;
}

const char *md_shortopts = "";
struct option md_longopts[] = {
#define OPTION_RELAX (OPTION_MD_BASE)
  {NULL, no_argument, NULL, 0}
};

void
md_show_usage (stream)
     FILE *stream ATTRIBUTE_UNUSED;
{
}

size_t md_longopts_size = sizeof (md_longopts);