* build fix

[binutils-gdb.git] / gas / config / tc-v850.c

/* tc-v850.c -- Assembler code for the NEC V850
   Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation.

   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.  */

#include <stdio.h>
#include <ctype.h>
#include "as.h"
#include "subsegs.h"     
#include "opcode/v850.h"

#define AREA_ZDA 0
#define AREA_SDA 1
#define AREA_TDA 2

/* sign-extend a 16-bit number */
#define SEXT16(x)       ((((x) & 0xffff) ^ (~ 0x7fff)) + 0x8000)

/* Temporarily holds the reloc in a cons expression.  */
static bfd_reloc_code_real_type hold_cons_reloc;

/* Set to TRUE if we want to be pedantic about signed overflows.  */
static boolean warn_signed_overflows   = FALSE;
static boolean warn_unsigned_overflows = FALSE;

/* Indicates the target BFD machine number.  */
static int     machine = -1;

/* Indicates the target processor(s) for the assemble.  */
static int      processor_mask = -1;

\f
/* Structure to hold information about predefined registers.  */
struct reg_name
{
  const char * name;
  int          value;
};

/* Generic assembler global variables which must be defined by all targets. */

/* Characters which always start a comment. */
const char comment_chars[] = "#";

/* Characters which start a comment at the beginning of a line.  */
const char line_comment_chars[] = ";#";

/* Characters which may be used to separate multiple commands on a 
   single line.  */
const char line_separator_chars[] = ";";

/* Characters which are used to indicate an exponent in a floating 
   point number.  */
const char EXP_CHARS[] = "eE";

/* Characters which mean that a number is a floating point constant, 
   as in 0d1.0.  */
const char FLT_CHARS[] = "dD";
\f

const relax_typeS md_relax_table[] =
{
  /* Conditional branches.  */
  {0xff,     -0x100,    2, 1},
  {0x1fffff, -0x200000, 6, 0},
  /* Unconditional branches.  */
  {0xff,     -0x100,    2, 3},
  {0x1fffff, -0x200000, 4, 0},
};


static segT sdata_section = NULL;
static segT tdata_section = NULL;
static segT zdata_section = NULL;
static segT sbss_section = NULL;
static segT tbss_section = NULL;
static segT zbss_section = NULL;
static segT rosdata_section = NULL;
static segT rozdata_section = NULL;
static segT scommon_section = NULL;
static segT tcommon_section = NULL;
static segT zcommon_section = NULL;
static segT call_table_data_section = NULL;
static segT call_table_text_section = NULL;

/* fixups */
#define MAX_INSN_FIXUPS (5)
struct v850_fixup
{
  expressionS              exp;
  int                      opindex;
  bfd_reloc_code_real_type reloc;
};

struct v850_fixup fixups [MAX_INSN_FIXUPS];
static int fc;

\f
void
v850_sdata (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (sdata_section, (subsegT) get_absolute_expression ());

  demand_empty_rest_of_line ();
}

void
v850_tdata (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (tdata_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_zdata (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (zdata_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_sbss (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (sbss_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_tbss (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (tbss_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_zbss (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (zbss_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_rosdata (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (rosdata_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_rozdata (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (rozdata_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_call_table_data (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (call_table_data_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_call_table_text (int ignore ATTRIBUTE_UNUSED)
{
  obj_elf_section_change_hook();
  
  subseg_set (call_table_text_section, (subsegT) get_absolute_expression ());
  
  demand_empty_rest_of_line ();
}

void
v850_bss (int ignore ATTRIBUTE_UNUSED)
{
  register int temp = get_absolute_expression ();

  obj_elf_section_change_hook();
  
  subseg_set (bss_section, (subsegT) temp);
   
  demand_empty_rest_of_line ();
}

void
v850_offset (int ignore ATTRIBUTE_UNUSED)
{
  int temp = get_absolute_expression ();
  
  temp -= frag_now_fix();
  
  if (temp > 0)
    (void) frag_more (temp);
  
  demand_empty_rest_of_line ();
}

/* Copied from obj_elf_common() in gas/config/obj-elf.c */
static void
v850_comm (area)
     int area;
{
  char *    name;
  char      c;
  char *    p;
  int       temp;
  unsigned int       size;
  symbolS * symbolP;
  int       have_align;

  name = input_line_pointer;
  c = get_symbol_end ();
  
  /* just after name is now '\0' */
  p = input_line_pointer;
  *p = c;
  
  SKIP_WHITESPACE ();
  
  if (*input_line_pointer != ',')
    {
      as_bad (_("Expected comma after symbol-name"));
      ignore_rest_of_line ();
      return;
    }
  
  input_line_pointer ++;                /* skip ',' */
  
  if ((temp = get_absolute_expression ()) < 0)
    {
      /* xgettext:c-format */
      as_bad (_(".COMMon length (%d.) < 0! Ignored."), temp);
      ignore_rest_of_line ();
      return;
    }
  
  size = temp;
  *p = 0;
  symbolP = symbol_find_or_make (name);
  *p = c;
  
  if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
    {
      as_bad (_("Ignoring attempt to re-define symbol"));
      ignore_rest_of_line ();
      return;
    }
  
  if (S_GET_VALUE (symbolP) != 0)
    {
      if (S_GET_VALUE (symbolP) != size)
        {
          /* xgettext:c-format */
          as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."),
                   S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
        }
    }
  
  know (symbol_get_frag (symbolP) == & zero_address_frag);
  
  if (*input_line_pointer != ',')
    have_align = 0;
  else
    {
      have_align = 1;
      input_line_pointer++;
      SKIP_WHITESPACE ();
    }
  
  if (! have_align || *input_line_pointer != '"')
    {
      if (! have_align)
        temp = 0;
      else
        {
          temp = get_absolute_expression ();
          
          if (temp < 0)
            {
              temp = 0;
              as_warn (_("Common alignment negative; 0 assumed"));
            }
        }
      
      if (symbol_get_obj (symbolP)->local)
        {
          segT   old_sec;
          int    old_subsec;
          char * pfrag;
          int    align;
          flagword      applicable;

          old_sec = now_seg;
          old_subsec = now_subseg;
      
          applicable = bfd_applicable_section_flags (stdoutput);
                  
          applicable &= SEC_ALLOC;
          
          switch (area)
            {
            case AREA_SDA:
              if (sbss_section == NULL)
                {
                  sbss_section = subseg_new (".sbss", 0);
              
                  bfd_set_section_flags (stdoutput, sbss_section, applicable);
              
                  seg_info (sbss_section)->bss = 1;
                }
              break;
          
            case AREA_ZDA:
              if (zbss_section == NULL)
                {
                  zbss_section = subseg_new (".zbss", 0);
                  
                  bfd_set_section_flags (stdoutput, sbss_section, applicable);
              
                  seg_info (zbss_section)->bss = 1;
                }
              break;
          
            case AREA_TDA:
              if (tbss_section == NULL)
                {
                  tbss_section = subseg_new (".tbss", 0);
                  
                  bfd_set_section_flags (stdoutput, tbss_section, applicable);
                  
                  seg_info (tbss_section)->bss = 1;
                }
              break;
            }

          if (temp)
            {
              /* convert to a power of 2 alignment */
              for (align = 0; (temp & 1) == 0; temp >>= 1, ++align)
                ;
              
              if (temp != 1)
                {
                  as_bad (_("Common alignment not a power of 2"));
                  ignore_rest_of_line ();
                  return;
                }
            }
          else
            align = 0;
          
          switch (area)
            {
            case AREA_SDA:
              record_alignment (sbss_section, align);
              obj_elf_section_change_hook();
              subseg_set (sbss_section, 0);
              break;

            case AREA_ZDA:
              record_alignment (zbss_section, align);
              obj_elf_section_change_hook();
              subseg_set (zbss_section, 0);
              break;

            case AREA_TDA:
              record_alignment (tbss_section, align);
              obj_elf_section_change_hook();
              subseg_set (tbss_section, 0);
              break;

            default:
              abort();
            }
          
          if (align)
            frag_align (align, 0, 0);

          switch (area)
            {
            case AREA_SDA:
              if (S_GET_SEGMENT (symbolP) == sbss_section)
                symbol_get_frag (symbolP)->fr_symbol = 0;
              break;

            case AREA_ZDA:
              if (S_GET_SEGMENT (symbolP) == zbss_section)
                symbol_get_frag (symbolP)->fr_symbol = 0;
              break;

            case AREA_TDA:
              if (S_GET_SEGMENT (symbolP) == tbss_section)
                symbol_get_frag (symbolP)->fr_symbol = 0;
              break;

            default:
              abort ();
            }
          
          symbol_set_frag (symbolP, frag_now);
          pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
                            (offsetT) size, (char *) 0);
          *pfrag = 0;
          S_SET_SIZE (symbolP, size);
          
          switch (area)
            {
            case AREA_SDA:
              S_SET_SEGMENT (symbolP, sbss_section);
              break;
              
            case AREA_ZDA:
              S_SET_SEGMENT (symbolP, zbss_section);
              break;
              
            case AREA_TDA:
              S_SET_SEGMENT (symbolP, tbss_section);
              break;
              
            default:
              abort();
            }
            
          S_CLEAR_EXTERNAL (symbolP);
          obj_elf_section_change_hook();
          subseg_set (old_sec, old_subsec);
        }
      else
        {
        allocate_common:
          S_SET_VALUE (symbolP, (valueT) size);
          S_SET_ALIGN (symbolP, temp);
          S_SET_EXTERNAL (symbolP);
          
          switch (area)
            {
            case AREA_SDA:
              if (scommon_section == NULL)
                {
                  flagword      applicable;
                  
                  applicable = bfd_applicable_section_flags (stdoutput);
                  
                  scommon_section = subseg_new (".scommon", 0);
                  
                  bfd_set_section_flags (stdoutput, scommon_section,
                                         (applicable
                     & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA
                        | SEC_HAS_CONTENTS)) | SEC_IS_COMMON);
                }
              S_SET_SEGMENT (symbolP, scommon_section);
              break;
              
            case AREA_ZDA:
              if (zcommon_section == NULL)
                {
                  flagword      applicable;
                  
                  applicable = bfd_applicable_section_flags (stdoutput);
                  
                  zcommon_section = subseg_new (".zcommon", 0);
                  
                  bfd_set_section_flags (stdoutput, zcommon_section,
                                         (applicable
                     & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA
                        | SEC_HAS_CONTENTS)) | SEC_IS_COMMON);
                }
              S_SET_SEGMENT (symbolP, zcommon_section);
              break;
              
            case AREA_TDA:
              if (tcommon_section == NULL)
                {
                  flagword      applicable;
                  
                  applicable = bfd_applicable_section_flags (stdoutput);
                  
                  tcommon_section = subseg_new (".tcommon", 0);
                  
                  bfd_set_section_flags (stdoutput, tcommon_section,
                                         (applicable
                     & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA
                        | SEC_HAS_CONTENTS)) | SEC_IS_COMMON);
                }
              S_SET_SEGMENT (symbolP, tcommon_section);
              break;
              
            default:
              abort();
            }
        }
    }
  else
    {
      input_line_pointer++;
      /* @@ Some use the dot, some don't.  Can we get some consistency??  */
      if (*input_line_pointer == '.')
        input_line_pointer++;
      /* @@ Some say data, some say bss.  */
      if (strncmp (input_line_pointer, "bss\"", 4)
          && strncmp (input_line_pointer, "data\"", 5))
        {
          while (*--input_line_pointer != '"')
            ;
          input_line_pointer--;
          goto bad_common_segment;
        }
      while (*input_line_pointer++ != '"')
        ;
      goto allocate_common;
    }

  symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;

  demand_empty_rest_of_line ();
  return;

  {
  bad_common_segment:
    p = input_line_pointer;
    while (*p && *p != '\n')
      p++;
    c = *p;
    *p = '\0';
    as_bad (_("bad .common segment %s"), input_line_pointer + 1);
    *p = c;
    input_line_pointer = p;
    ignore_rest_of_line ();
    return;
  }
}

void
set_machine (int number)
{
  machine = number;
  bfd_set_arch_mach (stdoutput, TARGET_ARCH, machine);

  switch (machine)
    {
    case 0: processor_mask = PROCESSOR_V850; break;
    case bfd_mach_v850e:  processor_mask = PROCESSOR_V850E; break;
    case bfd_mach_v850ea: processor_mask = PROCESSOR_V850EA; break;
    }
}

/* The target specific pseudo-ops which we support.  */
const pseudo_typeS md_pseudo_table[] =
{
  {"sdata",   v850_sdata,   0},
  {"tdata",   v850_tdata,   0},
  {"zdata",   v850_zdata,   0},
  {"sbss",    v850_sbss,    0},
  {"tbss",    v850_tbss,    0},
  {"zbss",    v850_zbss,    0},
  {"rosdata", v850_rosdata, 0},
  {"rozdata", v850_rozdata, 0},
  {"bss",     v850_bss,     0},
  {"offset",  v850_offset,  0},
  {"word",    cons,         4},
  {"zcomm",   v850_comm,    AREA_ZDA},
  {"scomm",   v850_comm,    AREA_SDA},
  {"tcomm",   v850_comm,    AREA_TDA},
  {"v850",    set_machine,  0},
  {"call_table_data", v850_call_table_data, 0},
  {"call_table_text", v850_call_table_text, 0},
  {"v850e",           set_machine,          bfd_mach_v850e},
  {"v850ea",          set_machine,          bfd_mach_v850ea},
  { NULL,     NULL,         0}
};

/* Opcode hash table.  */
static struct hash_control *v850_hash;

/* This table is sorted. Suitable for searching by a binary search. */
static const struct reg_name pre_defined_registers[] =
{
  { "ep",  30 },                /* ep - element ptr */
  { "gp",   4 },                /* gp - global ptr */
  { "hp",   2 },                /* hp - handler stack ptr */
  { "lp",  31 },                /* lp - link ptr */
  { "r0",   0 },
  { "r1",   1 },
  { "r10", 10 },
  { "r11", 11 },
  { "r12", 12 },
  { "r13", 13 },
  { "r14", 14 },
  { "r15", 15 },
  { "r16", 16 },
  { "r17", 17 },
  { "r18", 18 },
  { "r19", 19 },
  { "r2",   2 },
  { "r20", 20 },
  { "r21", 21 },
  { "r22", 22 },
  { "r23", 23 },
  { "r24", 24 },
  { "r25", 25 },
  { "r26", 26 },
  { "r27", 27 },
  { "r28", 28 },
  { "r29", 29 },
  { "r3",   3 },
  { "r30", 30 },
  { "r31", 31 },
  { "r4",   4 },
  { "r5",   5 },
  { "r6",   6 },
  { "r7",   7 },
  { "r8",   8 },
  { "r9",   9 },
  { "sp",   3 },                /* sp - stack ptr */
  { "tp",   5 },                /* tp - text ptr */
  { "zero", 0 },
};
#define REG_NAME_CNT    (sizeof (pre_defined_registers) / sizeof (struct reg_name))


static const struct reg_name system_registers[] = 
{
  { "ctbp",  20 },
  { "ctpc",  16 },
  { "ctpsw", 17 },
  { "dbpc",  18 },
  { "dbpsw", 19 },
  { "ecr",    4 },
  { "eipc",   0 },
  { "eipsw",  1 },
  { "fepc",   2 },
  { "fepsw",  3 },
  { "psw",    5 },
};
#define SYSREG_NAME_CNT (sizeof (system_registers) / sizeof (struct reg_name))

static const struct reg_name system_list_registers[] =
{
  {"PS",      5 },
  {"SR",      0 + 1}
};
#define SYSREGLIST_NAME_CNT     (sizeof (system_list_registers) / sizeof (struct reg_name))

static const struct reg_name cc_names[] =
{
  { "c",  0x1 },
  { "e",  0x2 },
  { "ge", 0xe },
  { "gt", 0xf },
  { "h",  0xb },
  { "l",  0x1 },
  { "le", 0x7 },
  { "lt", 0x6 },
  { "n",  0x4 },
  { "nc", 0x9 },
  { "ne", 0xa },
  { "nh", 0x3 },
  { "nl", 0x9 },
  { "ns", 0xc },
  { "nv", 0x8 },
  { "nz", 0xa },
  { "p",  0xc },
  { "s",  0x4 },
  { "sa", 0xd },
  { "t",  0x5 },
  { "v",  0x0 },
  { "z",  0x2 },
};
#define CC_NAME_CNT     (sizeof (cc_names) / sizeof (struct reg_name))

/* reg_name_search does a binary search of the given register table
   to see if "name" is a valid regiter name.  Returns the register
   number from the array on success, or -1 on failure. */

static int
reg_name_search (regs, regcount, name, accept_numbers)
     const struct reg_name * regs;
     int                     regcount;
     const char *            name;
     boolean                 accept_numbers;
{
  int middle, low, high;
  int cmp;
  symbolS * symbolP;

  /* If the register name is a symbol, then evaluate it.  */
  if ((symbolP = symbol_find (name)) != NULL)
    {
      /* If the symbol is an alias for another name then use that.
         If the symbol is an alias for a number, then return the number.  */
      if (symbol_equated_p (symbolP))
        {
          name = S_GET_NAME (symbol_get_value_expression (symbolP)->X_add_symbol);
        }
      else if (accept_numbers)
        {
          int reg = S_GET_VALUE (symbolP);
          
          if (reg >= 0 && reg <= 31)
            return reg;
        }

      /* Otherwise drop through and try parsing name normally.  */
    }
  
  low = 0;
  high = regcount - 1;

  do
    {
      middle = (low + high) / 2;
      cmp = strcasecmp (name, regs[middle].name);
      if (cmp < 0)
        high = middle - 1;
      else if (cmp > 0)
        low = middle + 1;
      else
        return regs[middle].value;
    }
  while (low <= high);
  return -1;
}


/* Summary of register_name().
 *
 * in: Input_line_pointer points to 1st char of operand.
 *
 * out: A expressionS.
 *      The operand may have been a register: in this case, X_op == O_register,
 *      X_add_number is set to the register number, and truth is returned.
 *      Input_line_pointer->(next non-blank) char after operand, or is in
 *      its original state.
 */
static boolean
register_name (expressionP)
     expressionS * expressionP;
{
  int    reg_number;
  char * name;
  char * start;
  char   c;

  /* Find the spelling of the operand */
  start = name = input_line_pointer;

  c = get_symbol_end ();

  reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT,
                                name, FALSE);

  * input_line_pointer = c;     /* put back the delimiting char */
  
  /* look to see if it's in the register table */
  if (reg_number >= 0) 
    {
      expressionP->X_op         = O_register;
      expressionP->X_add_number = reg_number;

      /* make the rest nice */
      expressionP->X_add_symbol = NULL;
      expressionP->X_op_symbol  = NULL;
      
      return true;
    }
  else
    {
      /* reset the line as if we had not done anything */
      input_line_pointer = start;
      
      return false;
    }
}

/* Summary of system_register_name().
 *
 * in:  Input_line_pointer points to 1st char of operand.
 *      expressionP points to an expression structure to be filled in.
 *      accept_numbers is true iff numerical register names may be used.
 *      accept_list_names is true iff the special names PS and SR may be 
 *      accepted.
 *
 * out: A expressionS structure in expressionP.
 *      The operand may have been a register: in this case, X_op == O_register,
 *      X_add_number is set to the register number, and truth is returned.
 *      Input_line_pointer->(next non-blank) char after operand, or is in
 *      its original state.
 */
static boolean
system_register_name (expressionP, accept_numbers, accept_list_names)
     expressionS * expressionP;
     boolean       accept_numbers;
     boolean       accept_list_names;
{
  int    reg_number;
  char * name;
  char * start;
  char   c;

  /* Find the spelling of the operand */
  start = name = input_line_pointer;

  c = get_symbol_end ();
  reg_number = reg_name_search (system_registers, SYSREG_NAME_CNT, name,
                                accept_numbers);

  * input_line_pointer = c;   /* put back the delimiting char */
  
  if (reg_number < 0
      && accept_numbers)
    {
      input_line_pointer   = start; /* reset input_line pointer */

      if (isdigit (* input_line_pointer))
        {
          reg_number = strtol (input_line_pointer, & input_line_pointer, 10);

          /* Make sure that the register number is allowable. */
          if (   reg_number < 0
              || (reg_number > 5 && reg_number < 16)
              || reg_number > 20
              )
            {
              reg_number = -1;
            }
        }
      else if (accept_list_names)
        {
          c = get_symbol_end ();
          reg_number = reg_name_search (system_list_registers,
                                        SYSREGLIST_NAME_CNT, name, FALSE);

          * input_line_pointer = c;   /* put back the delimiting char */
        }
    }
  
  /* look to see if it's in the register table */
  if (reg_number >= 0) 
    {
      expressionP->X_op         = O_register;
      expressionP->X_add_number = reg_number;

      /* make the rest nice */
      expressionP->X_add_symbol = NULL;
      expressionP->X_op_symbol  = NULL;

      return true;
    }
  else
    {
      /* reset the line as if we had not done anything */
      input_line_pointer = start;
      
      return false;
    }
}

/* Summary of cc_name().
 *
 * in: Input_line_pointer points to 1st char of operand.
 *
 * out: A expressionS.
 *      The operand may have been a register: in this case, X_op == O_register,
 *      X_add_number is set to the register number, and truth is returned.
 *      Input_line_pointer->(next non-blank) char after operand, or is in
 *      its original state.
 */
static boolean
cc_name (expressionP)
     expressionS * expressionP;
{
  int    reg_number;
  char * name;
  char * start;
  char   c;

  /* Find the spelling of the operand */
  start = name = input_line_pointer;

  c = get_symbol_end ();
  reg_number = reg_name_search (cc_names, CC_NAME_CNT, name, FALSE);

  * input_line_pointer = c;   /* put back the delimiting char */
  
  /* look to see if it's in the register table */
  if (reg_number >= 0) 
    {
      expressionP->X_op         = O_constant;
      expressionP->X_add_number = reg_number;

      /* make the rest nice */
      expressionP->X_add_symbol = NULL;
      expressionP->X_op_symbol  = NULL;

      return true;
    }
  else
    {
      /* reset the line as if we had not done anything */
      input_line_pointer = start;
      
      return false;
    }
}

static void
skip_white_space (void)
{
  while (   * input_line_pointer == ' '
         || * input_line_pointer == '\t')
    ++ input_line_pointer;
}

/* Summary of parse_register_list ().
 *
 * in: Input_line_pointer  points to 1st char of a list of registers.
 *     insn                is the partially constructed instruction.
 *     operand             is the operand being inserted.
 *
 * out: NULL if the parse completed successfully, otherwise a
 *      pointer to an error message is returned.  If the parse
 *      completes the correct bit fields in the instruction
 *      will be filled in.
 *
 * Parses register lists with the syntax:
 *
 *   { rX }
 *   { rX, rY }
 *   { rX - rY }
 *   { rX - rY, rZ }
 *   etc
 *
 * and also parses constant epxressions whoes bits indicate the
 * registers in the lists.  The LSB in the expression refers to
 * the lowest numbered permissable register in the register list,
 * and so on upwards.  System registers are considered to be very
 * high numbers.
 * 
 */
static char *
parse_register_list
(
  unsigned long *             insn,
  const struct v850_operand * operand
)
{
  static int  type1_regs[ 32 ] = { 30,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 };
  static int  type2_regs[ 32 ] = { 19, 18, 17, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 30, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 };
  static int  type3_regs[ 32 ] = {  3,  2,  1,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 15, 13, 12,  7,  6,  5,  4, 11, 10,  9,  8 };
  int *       regs;
  expressionS exp;


  /* Select a register array to parse. */
  switch (operand->shift)
    {
    case 0xffe00001: regs = type1_regs; break;
    case 0xfff8000f: regs = type2_regs; break;
    case 0xfff8001f: regs = type3_regs; break;
    default:
      as_bad (_("unknown operand shift: %x\n"), operand->shift);
      return _("internal failure in parse_register_list");
    }

  skip_white_space ();

  /* If the expression starts with a curly brace it is a register list.
     Otherwise it is a constant expression, whoes bits indicate which
     registers are to be included in the list.  */
  
  if (* input_line_pointer != '{')
    {
      int reg;
      int i;
                
      expression (& exp);
      
      if (exp.X_op != O_constant)
        return _("constant expression or register list expected");

      if (regs == type1_regs)
        {
          if (exp.X_add_number & 0xFFFFF000)
            return _("high bits set in register list expression");
          
          for (reg = 20; reg < 32; reg ++)
            if (exp.X_add_number & (1 << (reg - 20)))
              {
                for (i = 0; i < 32; i++)
                  if (regs[i] == reg)
                    * insn |= (1 << i);
              }
        }
      else if (regs == type2_regs)
        {
          if (exp.X_add_number & 0xFFFE0000)
            return _("high bits set in register list expression");
          
          for (reg = 1; reg < 16; reg ++)
            if (exp.X_add_number & (1 << (reg - 1)))
              {
                for (i = 0; i < 32; i++)
                  if (regs[i] == reg)
                    * insn |= (1 << i);
              }

          if (exp.X_add_number & (1 << 15))
            * insn |= (1 << 3);
          
          if (exp.X_add_number & (1 << 16))
            * insn |= (1 << 19);
        }
      else /* regs == type3_regs */
        {
          if (exp.X_add_number & 0xFFFE0000)
            return _("high bits set in register list expression");
          
          for (reg = 16; reg < 32; reg ++)
            if (exp.X_add_number & (1 << (reg - 16)))
              {
                for (i = 0; i < 32; i++)
                  if (regs[i] == reg)
                    * insn |= (1 << i);
              }

          if (exp.X_add_number & (1 << 16))
            * insn |= (1 << 19);
        }

      return NULL;
    }

  input_line_pointer ++;

  /* Parse the register list until a terminator (closing curly brace or
     new-line) is found.  */
  for (;;)
    {
      if (register_name (& exp))
        {
          int  i;
          
          /* Locate the given register in the list, and if it is there,
             insert the corresponding bit into the instruction.  */
          for (i = 0; i < 32; i++)
            {
              if (regs[ i ] == exp.X_add_number)
                {
                  * insn |= (1 << i);
                  break;
                }
            }

          if (i == 32)
            {
              return _("illegal register included in list");
            }
        }
      else if (system_register_name (& exp, true, true))
        {
          if (regs == type1_regs)
            {
              return _("system registers cannot be included in list");
            }
          else if (exp.X_add_number == 5)
            {
              if (regs == type2_regs)
                return _("PSW cannot be included in list");
              else
                * insn |= 0x8;
            }
          else if (exp.X_add_number < 4)
            * insn |= 0x80000;
          else
            return _("High value system registers cannot be included in list");
        }
      else if (* input_line_pointer == '}')
        {
          input_line_pointer ++;
          break;
        }
      else if (* input_line_pointer == ',')
        {
          input_line_pointer ++;
          continue;
        }
      else if (* input_line_pointer == '-')
        {
          /* We have encountered a range of registers: rX - rY */
          int         j;
          expressionS exp2;

          /* Skip the dash.  */
          ++ input_line_pointer;

          /* Get the second register in the range.  */
          if (! register_name (& exp2))
            {
              return _("second register should follow dash in register list");
              exp2.X_add_number = exp.X_add_number;
            }

          /* Add the rest of the registers in the range.  */
          for (j = exp.X_add_number + 1; j <= exp2.X_add_number; j++)
            {
              int  i;
          
              /* Locate the given register in the list, and if it is there,
                 insert the corresponding bit into the instruction.  */
              for (i = 0; i < 32; i++)
                {
                  if (regs[ i ] == j)
                    {
                      * insn |= (1 << i);
                      break;
                    }
                }

              if (i == 32)
                return _("illegal register included in list");
            }
        }
      else
        {
          break;
        }

      skip_white_space ();
    }

  return NULL;
}

CONST char * md_shortopts = "m:";

struct option md_longopts[] =
{
  {NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof md_longopts; 


void
md_show_usage (stream)
  FILE * stream;
{
  fprintf (stream, _(" V850 options:\n"));
  fprintf (stream, _("  -mwarn-signed-overflow    Warn if signed immediate values overflow\n"));
  fprintf (stream, _("  -mwarn-unsigned-overflow  Warn if unsigned immediate values overflow\n"));
  fprintf (stream, _("  -mv850                    The code is targeted at the v850\n"));
  fprintf (stream, _("  -mv850e                   The code is targeted at the v850e\n"));
  fprintf (stream, _("  -mv850ea                  The code is targeted at the v850ea\n"));
  fprintf (stream, _("  -mv850any                 The code is generic, despite any processor specific instructions\n"));
}

int
md_parse_option (c, arg)
     int    c;
     char * arg;
{
  if (c != 'm')
    {
      if (c != 'a')
        /* xgettext:c-format */
        fprintf (stderr, _("unknown command line option: -%c%s\n"), c, arg);
      return 0;
    }

  if (strcmp (arg, "warn-signed-overflow") == 0)
    {
      warn_signed_overflows = TRUE;
    }
  else if (strcmp (arg, "warn-unsigned-overflow") == 0)
    {
      warn_unsigned_overflows = TRUE;
    }
  else if (strcmp (arg, "v850") == 0)
    {
      machine = 0;
      processor_mask = PROCESSOR_V850;
    }
  else if (strcmp (arg, "v850e") == 0)
    {
      machine = bfd_mach_v850e;
      processor_mask = PROCESSOR_V850E;
    }
  else if (strcmp (arg, "v850ea") == 0)
    {
      machine = bfd_mach_v850ea;
      processor_mask = PROCESSOR_V850EA;
    }
  else if (strcmp (arg, "v850any") == 0)
    {
      machine = 0;                       /* Tell the world that this is for any v850 chip.  */
      processor_mask = PROCESSOR_V850EA; /* But support instructions for the extended versions.  */
    }
  else
    {
      /* xgettext:c-format */
      fprintf (stderr, _("unknown command line option: -%c%s\n"), c, arg);
      return 0;
    }
  
  return 1;
}

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

char *
md_atof (type, litp, sizep)
  int    type;
  char * litp;
  int *  sizep;
{
  int            prec;
  LITTLENUM_TYPE words[4];
  char *         t;
  int            i;

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

    case 'd':
      prec = 4;
      break;

    default:
      *sizep = 0;
      return _("bad call to md_atof");
    }
  
  t = atof_ieee (input_line_pointer, type, words);
  if (t)
    input_line_pointer = t;

  *sizep = prec * 2;

  for (i = prec - 1; i >= 0; i--)
    {
      md_number_to_chars (litp, (valueT) words[i], 2);
      litp += 2;
    }

  return NULL;
}


/* Very gross.  */
void
md_convert_frag (abfd, sec, fragP)
  bfd *      abfd ATTRIBUTE_UNUSED;
  asection * sec;
  fragS *    fragP;
{
  subseg_change (sec, 0);
  
  /* In range conditional or unconditional branch.  */
  if (fragP->fr_subtype == 0 || fragP->fr_subtype == 2)
    {
      fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
               fragP->fr_offset, 1, BFD_RELOC_UNUSED + (int)fragP->fr_opcode);
      fragP->fr_var = 0;
      fragP->fr_fix += 2;
    }
  /* Out of range conditional branch.  Emit a branch around a jump.  */
  else if (fragP->fr_subtype == 1)
    {
      unsigned char *buffer = 
        (unsigned char *) (fragP->fr_fix + fragP->fr_literal);

      /* Reverse the condition of the first branch.  */
      buffer[0] ^= 0x08;
      /* Mask off all the displacement bits.  */
      buffer[0] &= 0x8f;
      buffer[1] &= 0x07;
      /* Now set the displacement bits so that we branch
         around the unconditional branch.  */
      buffer[0] |= 0x30;

      /* Now create the unconditional branch + fixup to the final
         target.  */
      md_number_to_chars (buffer + 2, 0x00000780, 4);
      fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
               fragP->fr_offset, 1, BFD_RELOC_UNUSED +
               (int) fragP->fr_opcode + 1);
      fragP->fr_var = 0;
      fragP->fr_fix += 6;
    }
  /* Out of range unconditional branch.  Emit a jump.  */
  else if (fragP->fr_subtype == 3)
    {
      md_number_to_chars (fragP->fr_fix + fragP->fr_literal, 0x00000780, 4);
      fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol,
               fragP->fr_offset, 1, BFD_RELOC_UNUSED +
               (int) fragP->fr_opcode + 1);
      fragP->fr_var = 0;
      fragP->fr_fix += 4;
    }
  else
    abort ();
}

valueT
md_section_align (seg, addr)
     asection * seg;
     valueT     addr;
{
  int align = bfd_get_section_alignment (stdoutput, seg);
  return ((addr + (1 << align) - 1) & (-1 << align));
}

void
md_begin ()
{
  char *                              prev_name = "";
  register const struct v850_opcode * op;
  flagword                            applicable;

  if (strncmp (TARGET_CPU, "v850ea", 6) == 0)
    {
      if (machine == -1)
        machine = bfd_mach_v850ea;
      
      if (processor_mask == -1)
        processor_mask = PROCESSOR_V850EA;
    }
  else if (strncmp (TARGET_CPU, "v850e", 5) == 0)
    {
      if (machine == -1)
        machine        = bfd_mach_v850e;
      
      if (processor_mask == -1)
        processor_mask = PROCESSOR_V850E;
    }
  else
  if (strncmp (TARGET_CPU, "v850", 4) == 0)
    {
      if (machine == -1)
        machine        = 0;
      
      if (processor_mask == -1)
        processor_mask = PROCESSOR_V850;
    }
  else
    /* xgettext:c-format */
    as_bad (_("Unable to determine default target processor from string: %s"), 
            TARGET_CPU);

  v850_hash = hash_new();

  /* Insert unique names into hash table.  The V850 instruction set
     has many identical opcode names that have different opcodes based
     on the operands.  This hash table then provides a quick index to
     the first opcode with a particular name in the opcode table.  */

  op = v850_opcodes;
  while (op->name)
    {
      if (strcmp (prev_name, op->name)) 
        {
          prev_name = (char *) op->name;
          hash_insert (v850_hash, op->name, (char *) op);
        }
      op++;
    }

  bfd_set_arch_mach (stdoutput, TARGET_ARCH, machine);

  applicable = bfd_applicable_section_flags (stdoutput);
  
  call_table_data_section = subseg_new (".call_table_data", 0);
  bfd_set_section_flags (stdoutput, call_table_data_section,
                         applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
                                       | SEC_DATA | SEC_HAS_CONTENTS));
  
  call_table_text_section = subseg_new (".call_table_text", 0);
  bfd_set_section_flags (stdoutput, call_table_text_section,
                         applicable & (SEC_ALLOC | SEC_LOAD | SEC_READONLY
                                       | SEC_CODE));
  
  /* Restore text section as the current default.  */
  subseg_set (text_section, 0);
}


static bfd_reloc_code_real_type
handle_ctoff (const struct v850_operand * operand)
{
  if (operand == NULL)
    return BFD_RELOC_V850_CALLT_16_16_OFFSET;

  if (   operand->bits  != 6
      || operand->shift != 0)
    {
      as_bad (_("ctoff() relocation used on an instruction which does not support it"));
      return BFD_RELOC_64;  /* Used to indicate an error condition.  */
    }
      
  return BFD_RELOC_V850_CALLT_6_7_OFFSET;
}

static bfd_reloc_code_real_type
handle_sdaoff (const struct v850_operand * operand)
{
  if (operand == NULL)                             return BFD_RELOC_V850_SDA_16_16_OFFSET;
  if (operand->bits == 15 && operand->shift == 17) return BFD_RELOC_V850_SDA_15_16_OFFSET;
  if (operand->bits == -1)                         return BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET;
  
  if (   operand->bits  != 16
      || operand->shift != 16)
    {
      as_bad (_("sdaoff() relocation used on an instruction which does not support it"));
      return BFD_RELOC_64;  /* Used to indicate an error condition.  */
    }
  
  return BFD_RELOC_V850_SDA_16_16_OFFSET;
}

static bfd_reloc_code_real_type
handle_zdaoff (const struct v850_operand * operand)
{
  if (operand == NULL)                             return BFD_RELOC_V850_ZDA_16_16_OFFSET;
  if (operand->bits == 15 && operand->shift == 17) return BFD_RELOC_V850_ZDA_15_16_OFFSET;
  if (operand->bits == -1)                         return BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET;

  if (   operand->bits  != 16
      || operand->shift != 16)
    {
      as_bad (_("zdaoff() relocation used on an instruction which does not support it"));
      return BFD_RELOC_64;  /* Used to indicate an error condition.  */
    }
  
  return BFD_RELOC_V850_ZDA_16_16_OFFSET;
}

static bfd_reloc_code_real_type
handle_tdaoff (const struct v850_operand * operand)
{
  if (operand == NULL)                               return BFD_RELOC_V850_TDA_7_7_OFFSET;  /* data item, not an instruction.  */
  if (operand->bits == 6 && operand->shift == 1)     return BFD_RELOC_V850_TDA_6_8_OFFSET;  /* sld.w/sst.w, operand: D8_6  */
  if (operand->bits == 4 && operand->insert != NULL) return BFD_RELOC_V850_TDA_4_5_OFFSET;  /* sld.hu, operand: D5-4 */
  if (operand->bits == 4 && operand->insert == NULL) return BFD_RELOC_V850_TDA_4_4_OFFSET;  /* sld.bu, operand: D4   */
  if (operand->bits == 16 && operand->shift == 16)   return BFD_RELOC_V850_TDA_16_16_OFFSET; /* set1 & chums, operands: D16 */
  
  if (operand->bits != 7)
    {
      as_bad (_("tdaoff() relocation used on an instruction which does not support it"));
      return BFD_RELOC_64;  /* Used to indicate an error condition.  */
    }
  
  return  operand->insert != NULL
    ? BFD_RELOC_V850_TDA_7_8_OFFSET     /* sld.h/sst.h, operand: D8_7 */
    : BFD_RELOC_V850_TDA_7_7_OFFSET;    /* sld.b/sst.b, opreand: D7   */
}

/* Warning: The code in this function relies upon the definitions
   in the v850_operands[] array (defined in opcodes/v850-opc.c)
   matching the hard coded values contained herein.  */

static bfd_reloc_code_real_type
v850_reloc_prefix (const struct v850_operand * operand)
{
  boolean paren_skipped = false;


  /* Skip leading opening parenthesis.  */
  if (* input_line_pointer == '(')
    {
      ++ input_line_pointer;
      paren_skipped = true;
    }

#define CHECK_(name, reloc)                                             \
  if (strncmp (input_line_pointer, name##"(", strlen (name) + 1) == 0)  \
    {                                                                   \
      input_line_pointer += strlen (name);                              \
      return reloc;                                                     \
    }
  
  CHECK_ ("hi0",    BFD_RELOC_HI16);
  CHECK_ ("hi",     BFD_RELOC_HI16_S);
  CHECK_ ("lo",     BFD_RELOC_LO16);
  CHECK_ ("sdaoff", handle_sdaoff (operand));
  CHECK_ ("zdaoff", handle_zdaoff (operand));
  CHECK_ ("tdaoff", handle_tdaoff (operand));
  CHECK_ ("hilo",   BFD_RELOC_32);
  CHECK_ ("ctoff",  handle_ctoff (operand));
  
  /* Restore skipped parenthesis.  */
  if (paren_skipped)
    -- input_line_pointer;
  
  return BFD_RELOC_UNUSED;
}

/* Insert an operand value into an instruction.  */

static unsigned long
v850_insert_operand (insn, operand, val, file, line, str)
     unsigned long               insn;
     const struct v850_operand * operand;
     offsetT                     val;
     char *                      file;
     unsigned int                line;
     char *                      str;
{
  if (operand->insert)
    {
      const char * message = NULL;
      
      insn = operand->insert (insn, val, & message);
      if (message != NULL)
        {
          if ((operand->flags & V850_OPERAND_SIGNED)
              && ! warn_signed_overflows
              && strstr (message, "out of range") != NULL)
            {
              /* skip warning... */
            }
          else if ((operand->flags & V850_OPERAND_SIGNED) == 0
                   && ! warn_unsigned_overflows
                   && strstr (message, "out of range") != NULL)
            {
              /* skip warning... */
            }
          else if (str)
            {
              if (file == (char *) NULL)
                as_warn ("%s: %s", str, message);
              else
                as_warn_where (file, line, "%s: %s", str, message);
            }
          else
            {
              if (file == (char *) NULL)
                as_warn (message);
              else
                as_warn_where (file, line, message);
            }
        }
    }
  else
    {
      if (operand->bits != 32)
        {
          long  min, max;

          if ((operand->flags & V850_OPERAND_SIGNED) != 0)
            {
              if (! warn_signed_overflows)
                max = (1 << operand->bits) - 1;
              else
                max = (1 << (operand->bits - 1)) - 1;
              
              min = - (1 << (operand->bits - 1));
            }
          else
            {
              max = (1 << operand->bits) - 1;
              
              if (! warn_unsigned_overflows)
                min = - (1 << (operand->bits - 1));
              else
                min = 0;
            }
          
          if (val < (offsetT) min || val > (offsetT) max)
            {
              /* xgettext:c-format */
              const char * err = _("operand out of range (%s not between %ld and %ld)");
              char         buf[100];
              
              /* Restore min and mix to expected values for decimal ranges.  */
              if ((operand->flags & V850_OPERAND_SIGNED)
                  && ! warn_signed_overflows)
                max = (1 << (operand->bits - 1)) - 1;

              if (! (operand->flags & V850_OPERAND_SIGNED)
                  && ! warn_unsigned_overflows)
                min = 0;

              if (str)
                {
                  sprintf (buf, "%s: ", str);
                  
                  sprint_value (buf + strlen (buf), val);
                }
              else
                sprint_value (buf, val);
              
              if (file == (char *) NULL)
                as_warn (err, buf, min, max);
              else
                as_warn_where (file, line, err, buf, min, max);
            }
        }

      insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift);
    }
  
  return insn;
}

\f
static char                 copy_of_instruction [128];

void
md_assemble (str) 
     char * str;
{
  char *                    s;
  char *                    start_of_operands;
  struct v850_opcode *      opcode;
  struct v850_opcode *      next_opcode;
  const unsigned char *     opindex_ptr;
  int                       next_opindex;
  int                       relaxable = 0;
  unsigned long             insn;
  unsigned long             insn_size;
  char *                    f;
  int                       i;
  int                       match;
  boolean                   extra_data_after_insn = false;
  unsigned                  extra_data_len = 0;
  unsigned long             extra_data = 0;
  char *                    saved_input_line_pointer;

  
  strncpy (copy_of_instruction, str, sizeof (copy_of_instruction) - 1);
  
  /* Get the opcode.  */
  for (s = str; *s != '\0' && ! isspace (*s); s++)
    continue;
  
  if (*s != '\0')
    *s++ = '\0';

  /* find the first opcode with the proper name */
  opcode = (struct v850_opcode *) hash_find (v850_hash, str);
  if (opcode == NULL)
    {
      /* xgettext:c-format */
      as_bad (_("Unrecognized opcode: `%s'"), str);
      ignore_rest_of_line ();
      return;
    }

  str = s;
  while (isspace (* str))
    ++ str;

  start_of_operands = str;

  saved_input_line_pointer = input_line_pointer;
  
  for (;;)
    {
      const char * errmsg = NULL;

      match = 0;
      
      if ((opcode->processors & processor_mask) == 0)
        {
          errmsg = _("Target processor does not support this instruction.");
          goto error;
        }
      
      relaxable = 0;
      fc = 0;
      next_opindex = 0;
      insn = opcode->opcode;
      extra_data_after_insn = false;

      input_line_pointer = str = start_of_operands;

      for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr ++)
        {
          const struct v850_operand * operand;
          char *                      hold;
          expressionS                 ex;
          bfd_reloc_code_real_type    reloc;

          if (next_opindex == 0)
            {
              operand = & v850_operands[ * opindex_ptr ];
            }
          else
            {
              operand      = & v850_operands[ next_opindex ];
              next_opindex = 0;
            }

          errmsg = NULL;

          while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
            ++ str;

          if (operand->flags & V850_OPERAND_RELAX)
            relaxable = 1;

          /* Gather the operand. */
          hold = input_line_pointer;
          input_line_pointer = str;
          
          /* lo(), hi(), hi0(), etc... */
          if ((reloc = v850_reloc_prefix (operand)) != BFD_RELOC_UNUSED)
            {
              /* This is a fake reloc, used to indicate an error condition.  */
              if (reloc == BFD_RELOC_64)
                {
                  match = 1;
                  goto error;
                }
                 
              expression (& ex);

              if (ex.X_op == O_constant)
                {
                  switch (reloc)
                    {
                    case BFD_RELOC_V850_ZDA_16_16_OFFSET:
                      /* To cope with "not1 7, zdaoff(0xfffff006)[r0]"
                         and the like.  */
                      /* Fall through.  */
                      
                    case BFD_RELOC_LO16:
                      {
                        /* Truncate, then sign extend the value.  */
                        ex.X_add_number = SEXT16 (ex.X_add_number);
                        break;
                      }

                    case BFD_RELOC_HI16:
                      {
                        /* Truncate, then sign extend the value.  */
                        ex.X_add_number = SEXT16 (ex.X_add_number >> 16);
                        break;
                      }

                    case BFD_RELOC_HI16_S:
                      {
                        /* Truncate, then sign extend the value.  */
                        int temp = (ex.X_add_number >> 16) & 0xffff;

                        temp += (ex.X_add_number >> 15) & 1;

                        ex.X_add_number = SEXT16 (temp);
                        break;
                      }
                    
                    case BFD_RELOC_32:
                      if ((operand->flags & V850E_IMMEDIATE32) == 0)
                        {
                          errmsg = _("immediate operand is too large");
                          goto error;
                        }
                      
                      extra_data_after_insn = true;
                      extra_data_len        = 4;
                      extra_data            = ex.X_add_number;
                      ex.X_add_number       = 0;
                      break;
                      
                    default:
                      fprintf (stderr, "reloc: %d\n", reloc);
                      as_bad (_("AAARG -> unhandled constant reloc"));
                      break;
                    }

                  if (fc > MAX_INSN_FIXUPS)
                    as_fatal (_("too many fixups"));
                  
                  fixups[ fc ].exp     = ex;
                  fixups[ fc ].opindex = * opindex_ptr;
                  fixups[ fc ].reloc   = reloc;
                  fc++;
                }
              else
                {
                  if (reloc == BFD_RELOC_32)
                    {
                      if ((operand->flags & V850E_IMMEDIATE32) == 0)
                        {
                          errmsg = _("immediate operand is too large");
                          goto error;
                        }
                      
                      extra_data_after_insn = true;
                      extra_data_len        = 4;
                      extra_data            = ex.X_add_number;
                    }
                      
                  if (fc > MAX_INSN_FIXUPS)
                    as_fatal (_("too many fixups"));

                  fixups[ fc ].exp     = ex;
                  fixups[ fc ].opindex = * opindex_ptr;
                  fixups[ fc ].reloc   = reloc;
                  fc++;
                }
            }
          else
            {
              errmsg = NULL;
              
              if ((operand->flags & V850_OPERAND_REG) != 0) 
                {
                  if (!register_name (& ex))
                    {
                      errmsg = _("invalid register name");
                    }
                  else if ((operand->flags & V850_NOT_R0)
                      && ex.X_add_number == 0)
                    {
                      errmsg = _("register r0 cannot be used here");
                      
                      /* Force an error message to be generated by
                         skipping over any following potential matches
                         for this opcode.  */
                      opcode += 3;
                    }
                }
              else if ((operand->flags & V850_OPERAND_SRG) != 0) 
                {
                  if (!system_register_name (& ex, true, false))
                    {
                      errmsg = _("invalid system register name");
                    }
                }
              else if ((operand->flags & V850_OPERAND_EP) != 0)
                {
                  char * start = input_line_pointer;
                  char   c     = get_symbol_end ();
                  
                  if (strcmp (start, "ep") != 0 && strcmp (start, "r30") != 0)
                    {
                      /* Put things back the way we found them.  */
                      *input_line_pointer = c;
                      input_line_pointer = start;
                      errmsg = _("expected EP register");
                      goto error;
                    }
                  
                  *input_line_pointer = c;
                  str = input_line_pointer;
                  input_line_pointer = hold;
              
                  while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
                    ++ str;
                  continue;
                }
              else if ((operand->flags & V850_OPERAND_CC) != 0) 
                {
                  if (!cc_name (& ex))
                    {
                      errmsg = _("invalid condition code name");
                    }
                }
              else if (operand->flags & V850E_PUSH_POP) 
                {
                  errmsg = parse_register_list (& insn, operand);
                  
                  /* The parse_register_list() function has already done
                     everything, so fake a dummy expression.  */
                  ex.X_op         = O_constant;
                  ex.X_add_number = 0;
                }
              else if (operand->flags & V850E_IMMEDIATE16) 
                {
                  expression (& ex);

                  if (ex.X_op != O_constant)
                    errmsg = _("constant expression expected");
                  else if (ex.X_add_number & 0xffff0000)
                    {
                      if (ex.X_add_number & 0xffff)
                        errmsg = _("constant too big to fit into instruction");
                      else if ((insn & 0x001fffc0) == 0x00130780)
                        ex.X_add_number >>= 16;
                      else
                        errmsg = _("constant too big to fit into instruction");
                    }
                  
                  extra_data_after_insn = true;
                  extra_data_len        = 2;
                  extra_data            = ex.X_add_number;
                  ex.X_add_number       = 0;
                }
              else if (operand->flags & V850E_IMMEDIATE32) 
                {
                  expression (& ex);
                  
                  if (ex.X_op != O_constant)
                    errmsg = _("constant expression expected");
                  
                  extra_data_after_insn = true;
                  extra_data_len        = 4;
                  extra_data            = ex.X_add_number;
                  ex.X_add_number       = 0;
                }
              else if (register_name (& ex)
                       && (operand->flags & V850_OPERAND_REG) == 0)
                {
                  char c;
                  int  exists = 0;
                  
                  /* It is possible that an alias has been defined that
                     matches a register name.  For example the code may
                     include a ".set ZERO, 0" directive, which matches
                     the register name "zero".  Attempt to reparse the
                     field as an expression, and only complain if we
                     cannot generate a constant.  */

                  input_line_pointer = str;

                  c = get_symbol_end ();
                  
                  if (symbol_find (str) != NULL)
                    exists = 1;
                  
                  * input_line_pointer = c;
                  input_line_pointer = str;
                  
                  expression (& ex);

                  if (ex.X_op != O_constant)
                    {
                      /* If this register is actually occuring too early on
                         the parsing of the instruction, (because another
                         field is missing) then report this.  */
                      if (opindex_ptr[1] != 0
                          && (v850_operands [opindex_ptr [1]].flags & V850_OPERAND_REG))
                        errmsg = _("syntax error: value is missing before the register name");
                      else
                        errmsg = _("syntax error: register not expected");

                      /* If we created a symbol in the process of this test then
                         delete it now, so that it will not be output with the real
                         symbols... */
                      if (exists == 0
                          && ex.X_op == O_symbol)
                        symbol_remove (ex.X_add_symbol,
                                       & symbol_rootP, & symbol_lastP);
                    }
                }
              else if (system_register_name (& ex, false, false)
                       && (operand->flags & V850_OPERAND_SRG) == 0)
                {
                  errmsg = _("syntax error: system register not expected");
                }
              else if (cc_name (&ex)
                       && (operand->flags & V850_OPERAND_CC) == 0)
                {
                  errmsg = _("syntax error: condition code not expected");
                }
              else
                {
                  expression (& ex);
                  /* Special case:
                     If we are assembling a MOV instruction (or a CALLT.... :-)
                     and the immediate value does not fit into the bits
                     available then create a fake error so that the next MOV
                     instruction will be selected.  This one has a 32 bit
                     immediate field.  */

                  if (((insn & 0x07e0) == 0x0200)
                      && ex.X_op == O_constant
                      && (ex.X_add_number < (- (1 << (operand->bits - 1)))
                          || ex.X_add_number > ((1 << operand->bits) - 1)))
                    errmsg = _("immediate operand is too large");
                }

              if (errmsg)
                goto error;
              
/* fprintf (stderr, " insn: %x, operand %d, op: %d, add_number: %d\n",
   insn, opindex_ptr - opcode->operands, ex.X_op, ex.X_add_number); */

              switch (ex.X_op) 
                {
                case O_illegal:
                  errmsg = _("illegal operand");
                  goto error;
                case O_absent:
                  errmsg = _("missing operand");
                  goto error;
                case O_register:
                  if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0)
                    {
                      errmsg = _("invalid operand");
                      goto error;
                    }
                  insn = v850_insert_operand (insn, operand, ex.X_add_number,
                                              (char *) NULL, 0,
                                              copy_of_instruction);
                  break;

                case O_constant:
                  insn = v850_insert_operand (insn, operand, ex.X_add_number,
                                              (char *) NULL, 0,
                                              copy_of_instruction);
                  break;

                default:
                  /* We need to generate a fixup for this expression.  */
                  if (fc >= MAX_INSN_FIXUPS)
                    as_fatal (_("too many fixups"));

                  fixups[ fc ].exp     = ex;
                  fixups[ fc ].opindex = * opindex_ptr;
                  fixups[ fc ].reloc   = BFD_RELOC_UNUSED;
                  ++fc;
                  break;
                }
            }

          str = input_line_pointer;
          input_line_pointer = hold;

          while (*str == ' ' || *str == ',' || *str == '[' || *str == ']'
                 || *str == ')')
            ++str;
        }
      match = 1;

    error:
      if (match == 0)
        {
          next_opcode = opcode + 1;
          if (next_opcode->name != NULL
              && strcmp (next_opcode->name, opcode->name) == 0)
            {
              opcode = next_opcode;

              /* Skip versions that are not supported by the target
                 processor.  */
              if ((opcode->processors & processor_mask) == 0)
                goto error;
              
              continue;
            }
          
          as_bad ("%s: %s", copy_of_instruction, errmsg);
          
          if (* input_line_pointer == ']')
            ++ input_line_pointer;
          
          ignore_rest_of_line ();
          input_line_pointer = saved_input_line_pointer;
          return;
        }
      break;
    }
      
  while (isspace (*str))
    ++str;

  if (*str != '\0')
    /* xgettext:c-format */
    as_bad (_("junk at end of line: `%s'"), str);

  input_line_pointer = str;

  /* Write out the instruction. */
  
  if (relaxable && fc > 0)
    {
      insn_size = 2;
      fc = 0;

      if (!strcmp (opcode->name, "br"))
        {
          f = frag_var (rs_machine_dependent, 4, 2, 2,
                        fixups[0].exp.X_add_symbol,
                        fixups[0].exp.X_add_number,
                        (char *)fixups[0].opindex);
          md_number_to_chars (f, insn, insn_size);
          md_number_to_chars (f + 2, 0, 2);
        }
      else
        {
          f = frag_var (rs_machine_dependent, 6, 4, 0,
                        fixups[0].exp.X_add_symbol,
                        fixups[0].exp.X_add_number,
                        (char *)fixups[0].opindex);
          md_number_to_chars (f, insn, insn_size);
          md_number_to_chars (f + 2, 0, 4);
        }
    }
  else 
    {
      /* Four byte insns have an opcode with the two high bits on.  */
      if ((insn & 0x0600) == 0x0600)
        insn_size = 4;
      else
        insn_size = 2;

      /* Special case: 32 bit MOV */
      if ((insn & 0xffe0) == 0x0620)
        insn_size = 2;
      
      f = frag_more (insn_size);
      
      md_number_to_chars (f, insn, insn_size);

      if (extra_data_after_insn)
        {
          f = frag_more (extra_data_len);
          
          md_number_to_chars (f, extra_data, extra_data_len);

          extra_data_after_insn = false;
        }
    }

  /* Create any fixups.  At this point we do not use a
     bfd_reloc_code_real_type, but instead just use the
     BFD_RELOC_UNUSED plus the operand index.  This lets us easily
     handle fixups for any operand type, although that is admittedly
     not a very exciting feature.  We pick a BFD reloc type in
     md_apply_fix.  */  
  for (i = 0; i < fc; i++)
    {
      const struct v850_operand * operand;
      bfd_reloc_code_real_type    reloc;
      
      operand = & v850_operands[ fixups[i].opindex ];

      reloc = fixups[i].reloc;
      
      if (reloc != BFD_RELOC_UNUSED)
        {
          reloc_howto_type * reloc_howto = bfd_reloc_type_lookup (stdoutput,
                                                                  reloc);
          int                size;
          int                address;
          fixS *             fixP;

          if (!reloc_howto)
            abort();
          
          size = bfd_get_reloc_size (reloc_howto);

          /* XXX This will abort on an R_V850_8 reloc -
             is this reloc actually used ? */
          if (size != 2 && size != 4) 
            abort ();

          address = (f - frag_now->fr_literal) + insn_size - size;

          if (reloc == BFD_RELOC_32)
            {
              address += 2;
            }
          
          fixP = fix_new_exp (frag_now, address, size,
                              & fixups[i].exp, 
                              reloc_howto->pc_relative,
                              reloc);

          switch (reloc)
            {
            case BFD_RELOC_LO16:
            case BFD_RELOC_HI16:
            case BFD_RELOC_HI16_S:
              fixP->fx_no_overflow = 1;
              break;
            default:
              break;
            }
        }
      else
        {
          fix_new_exp (
                       frag_now,
                       f - frag_now->fr_literal, 4,
                       & fixups[i].exp,
                       1 /* FIXME: V850_OPERAND_RELATIVE ??? */,
                       (bfd_reloc_code_real_type) (fixups[i].opindex
                                                   + (int) BFD_RELOC_UNUSED)
                       );
        }
    }

  input_line_pointer = saved_input_line_pointer;
}


/* If while processing a fixup, a reloc really needs to be created */
/* then it is done here.  */
                 
arelent *
tc_gen_reloc (seg, fixp)
     asection * seg ATTRIBUTE_UNUSED;
     fixS *     fixp;
{
  arelent * reloc;
  
  reloc              = (arelent *) xmalloc (sizeof (arelent));
  reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
  *reloc->sym_ptr_ptr= symbol_get_bfdsym (fixp->fx_addsy);
  reloc->address     = fixp->fx_frag->fr_address + fixp->fx_where;
  reloc->howto       = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);

  if (reloc->howto == (reloc_howto_type *) NULL)
    {
      as_bad_where (fixp->fx_file, fixp->fx_line,
                    /* xgettext:c-format */
                    _("reloc %d not supported by object file format"),
                    (int) fixp->fx_r_type);

      xfree (reloc);
      
      return NULL;
    }
  
  if (   fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY
      || fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT)
    reloc->addend = fixp->fx_offset;
  else
    reloc->addend = fixp->fx_addnumber;
  
  return reloc;
}

/* Assume everything will fit in two bytes, then expand as necessary.  */
int
md_estimate_size_before_relax (fragp, seg)
     fragS * fragp;
     asection * seg ATTRIBUTE_UNUSED;
{
  if (fragp->fr_subtype == 0)
    fragp->fr_var = 4;
  else if (fragp->fr_subtype == 2)
    fragp->fr_var = 2;
  else
    abort ();
  return 2;
} 

long
v850_pcrel_from_section (fixp, section)
     fixS * fixp;
     segT   section;
{
  /* If the symbol is undefined, or in a section other than our own,
     or it is weak (in which case it may well be in another section,
     then let the linker figure it out.  */
  if (fixp->fx_addsy != (symbolS *) NULL
      && (! S_IS_DEFINED (fixp->fx_addsy)
          || S_IS_WEAK (fixp->fx_addsy)
          || (S_GET_SEGMENT (fixp->fx_addsy) != section)))
    return 0;
  
  return fixp->fx_frag->fr_address + fixp->fx_where;
}

int
md_apply_fix3 (fixp, valuep, seg)
     fixS *   fixp;
     valueT * valuep;
     segT     seg ATTRIBUTE_UNUSED;
{
  valueT value;
  char * where;

  if (   fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
      || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
    {
      fixp->fx_done = 0;
      return 1;
    }

  if (fixp->fx_addsy == (symbolS *) NULL)
    {
      value = * valuep;
      fixp->fx_done = 1;
    }
  else if (fixp->fx_pcrel)
    value = * valuep;
  else
    {
      value = fixp->fx_offset;
      if (fixp->fx_subsy != (symbolS *) NULL)
        {
          if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
            value -= S_GET_VALUE (fixp->fx_subsy);
          else
            {
              /* We don't actually support subtracting a symbol.  */
              as_bad_where (fixp->fx_file, fixp->fx_line,
                            _("expression too complex"));
            }
        }
    }

  if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED)
    {
      int                         opindex;
      const struct v850_operand * operand;
      unsigned long               insn;

      opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED;
      operand = & v850_operands[ opindex ];

      /* Fetch the instruction, insert the fully resolved operand
         value, and stuff the instruction back again.

         Note the instruction has been stored in little endian
         format!  */
      where = fixp->fx_frag->fr_literal + fixp->fx_where;

      insn = bfd_getl32 ((unsigned char *) where);
      insn = v850_insert_operand (insn, operand, (offsetT) value,
                                  fixp->fx_file, fixp->fx_line, NULL);
      bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);

      if (fixp->fx_done)
        {
          /* Nothing else to do here. */
          return 1;
        }

      /* Determine a BFD reloc value based on the operand information.  
         We are only prepared to turn a few of the operands into relocs. */

      if (operand->bits == 22)
        fixp->fx_r_type = BFD_RELOC_V850_22_PCREL;
      else if (operand->bits == 9)
        fixp->fx_r_type = BFD_RELOC_V850_9_PCREL;
      else
        {
          /* fprintf (stderr, "bits: %d, insn: %x\n", operand->bits, insn); */
          
          as_bad_where (fixp->fx_file, fixp->fx_line,
                       _("unresolved expression that must be resolved"));
          fixp->fx_done = 1;
          return 1;
        }
    }
  else if (fixp->fx_done)
    {
      /* We still have to insert the value into memory!  */
      where = fixp->fx_frag->fr_literal + fixp->fx_where;

      if (fixp->fx_size == 1)
        * where = value & 0xff;
      else if (fixp->fx_size == 2)
        bfd_putl16 (value & 0xffff, (unsigned char *) where);
      else if (fixp->fx_size == 4)
        bfd_putl32 (value, (unsigned char *) where);
    }
  
  fixp->fx_addnumber = value;
  return 1;
}

\f
/* Parse a cons expression.  We have to handle hi(), lo(), etc
   on the v850.  */
void
parse_cons_expression_v850 (exp)
  expressionS * exp;
{
  /* See if there's a reloc prefix like hi() we have to handle.  */
  hold_cons_reloc = v850_reloc_prefix (NULL);

  /* Do normal expression parsing.  */
  expression (exp);
}

/* Create a fixup for a cons expression.  If parse_cons_expression_v850
   found a reloc prefix, then we use that reloc, else we choose an
   appropriate one based on the size of the expression.  */
void
cons_fix_new_v850 (frag, where, size, exp)
     fragS * frag;
     int where;
     int size;
     expressionS *exp;
{
  if (hold_cons_reloc == BFD_RELOC_UNUSED)
    {
      if (size == 4)
        hold_cons_reloc = BFD_RELOC_32;
      if (size == 2)
        hold_cons_reloc = BFD_RELOC_16;
      if (size == 1)
        hold_cons_reloc = BFD_RELOC_8;
    }

  if (exp != NULL)
    fix_new_exp (frag, where, size, exp, 0, hold_cons_reloc);
  else
    fix_new (frag, where, size, NULL, 0, 0, hold_cons_reloc);
}

boolean
v850_fix_adjustable (fixP)
    fixS * fixP;
{
  if (fixP->fx_addsy == NULL)
    return 1;
 
  /* Prevent all adjustments to global symbols. */
  if (S_IS_EXTERN (fixP->fx_addsy))
    return 0;
  
  /* Similarly for weak symbols.  */
  if (S_IS_WEAK (fixP->fx_addsy))
    return 0;
  
  /* Don't adjust function names */
  if (S_IS_FUNCTION (fixP->fx_addsy))
    return 0;

  /* We need the symbol name for the VTABLE entries */
  if (   fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
      || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
    return 0;
  
  return 1;
}
 
int
v850_force_relocation (fixP)
      struct fix * fixP;
{
  if (fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy))
    return 1;
  
  if (   fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
      || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
    return 1;
 
  return 0;
}